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Papers quoted in Current Contents on project 1-07-038


Quoted papers: 22
Other papers: 19
Total: 41


Title: PHOTOCHEMICAL TRANSFORMATIONS OF 1,1,4-TRISUBSTITUTED BUTA-1,3-DIENES:2,5-DIPHENYL- AND 2-(p-METHOXYPHENYL)-5-PHENYL-PENTA-2,4-DIENOIC ACID

Authors:
Karminski-Zamola, Grace (20316)
Ristevski, Anšelko
Bajię, Miroslav (1543)
Journal: JOURNAL OF CHEMICAL RESEARCH (S)
Number: 12
Year: 1992
Pages: from 416 to 417
Number of references: 6
Language: engleski
Summary: UV irradiation of (E,E)-diphenylpenta-2,4-dienoic acid (1) and(E,E)-2-(p-methoxyphenyl)-5-phenylpenta-2,4-dienoic acid (2) gives products of decarboxylation (3,4 and 6), cyclization (7 and 8) and rearrangement (9 and 10).
Keywords: (E,E)-2,5-DIPHENYLPENTA-2,4-DIENOICACID, (E,E)-2-(p-METHOXYPHENYL)-5-PHENYLPENTA-2,4-DIENOICACID, PHOTODECARBOXYLATION, PHOTOREARRANGEMENT, trans-3,4-DIPHENYLCYCLOBUTENE, trans-3-(p-METHOXYPHENYL)-4-PHENYLCYCLOBUTENE, 1-BENZYL-3-PHENYLCYCLOPROPENE, 1-((p-METHOXYPHENYL)METHYL)-3-PHENYLCYCLOPROPENE, (Z,Z)-1,4-DIPHENYLBUTA-1,3-DIENE

Title: SYNTHESIS OF NEW HETEROPOLYCYCLIC BIS-CARBOXAMIDE: 3,5-DICHLORO-N,N'(p-CHLOROPHENYL)DITHIENOŠ3,2-b:2',3'-dĘFURAN-2,6-CARBOXAMI DE

Authors:
Karminski-Zamola, Grace (20316)
Maleševię, Miroslav
Bajię, Miroslav (1543)
Golja, Gordan
Journal: CROATICA CHEMICA ACTA
Number: 4
ISSN: 0011-1643
Volume: 65
Year: 1992
Pages: from 847 to 849
Number of references: 6
Language: engleski
Summary: New heteropolycyclic bis-carboxamide (5) was synthesized in multistep synthesis starting from furylacrylic acid (1). This type of compounds are now being examined as potential anti-AIDS agent. The most important stage in the multistep synthesis is the preparation of intermediate 3,5-dichloro-dithienoŠ3,2-b:2',3'-dĘfuran-2,6-dicarbonyl chloride (4).
Keywords: 3,5-DICHLORO-N,N'(p-CHLORPHENYL)DITHIENOŠ3,2-b:2',3'-dĘFURAN-2,6-C ARBOXAMIDE, ANTI-AIDS AGENT, 3,5-DICHLORO-DITHIENOŠ3,2-b:2',3'-dĘFURAN-2,6-DICARBONYL CHLORIDE

Title: MASS SPECTRAL FRAGMENTATION PATTERNS OF UNSYMMETRIC FURYLACRYLIC ACID DICARBONYLDICHLORIDES AND DIANILIDES: 2,3-DICHLORO-3-(5-CHLORO-CARBONYL)-2-FURYLACRYLCARBONYLCHLORIDE AND 2,3-DICHLORO-3-(5-ANILIDO-2-FURYL)-2-ACRYLCARBONYLANILIDE

Authors:
Karminski-Zamola, Grace (20316)
Dogan, Jasna
Bajię, Miroslav (1543)
Journal: RAPID COMMUNICATIONS IN MASS SPECTROMETRY
Volume: 7
Year: 1993
Pages: from 460 to 461
Number of references: 11
Language: engleski
Summary: Electron ionization mass spectrometry is shown to provide a valid analytical tool for the structural characterization of the title compounds. Diagnostic fragmentation pathways of an unsymmetrically substituted 2,5-furan dicarbonyl dichloride and dianilide were observed.
Keywords: MASS SPECTRAL FRAGMENTATION PATTERNS, UNSYMMETRIC FURYLACRYLIC ACID DICARBONYLDICHLORIDES AND DIANILIDES, CLEAVAGE OF THE C-R BOND, VINYLFURANS, VINYLTHIOPHENES

Title: MASS SPECTRAL FRAGMENTATION PATTERNS OF SOME THIENOŠ3,2-bĘ- AND THIENOŠ2,3-bĘ-THIOPHENE-2-CARBONYLCHLORIDES AND -2-CARBONYLANILIDES

Authors:
Karminski-Zamola, Grace (20316)
Cvetko, Magda
Švob, Vladimir
Journal: RAPID COMMUNICATIONS IN MASS SPECTROMETRY
Volume: 7
Year: 1993
Pages: from 911 to 913
Number of references: 8
Language: engleski
Summary: The electron impact mass spectra of some thienoŠ3,2-bĘ-thienoŠ2,3-bĘ-thiophene-2-carbonylchlorides and-2-carbonylanilides are discussed. Dominant peaks in the anilides are formed by cleavage of the C-N amide bond and these ions fragment further by cleavage of CO.The fragment ion C3HS/+. m/z69 is characteristic of carbonylchlorides and also carbonylanilides.
Keywords: MASS SPECTRAL FRAGMENTATION PATTERNS, THIENOŠ3,2-bĘTHIOPHENE-2-CARBONYLCHLORIDES, THIENOŠ3,2-bĘTHIOPHENE-2-CARBONYLANILIDES, THIENOŠ2,3-bĘTHIOPHENE-2-CARBONYLCHLORIDES, THIENOŠ2,3-bĘTHIOPHENE-2-CARBONYLANILIDES, CLEAVAGE OF THE C-N AMIDE BOND, SIMPLE FISSION, CLEAVAGE OF C-Cl BOND

Title: SYNTHESIS OF SOME FURYL- AND THIENYLACRILATES OR DIACRYLATES AND ACRYLIC ACIDS BY THE PALLADIUM CATALYSED VINYLATION OF SUBSTITUTED BROMOFURANS AND BROMOTHIOPHENES

Authors:
Karminski-Zamola, Grace (20316)
Dogan, Jasna
Bajię, Miroslav (1543)
Blaževię, Jelena
Maleševię, Miroslav
Journal: HETEROCYCLES
Number: 4
Volume: 38
Year: 1994
Pages: from 759 to 767
Number of references: 20
Language: engleski
Summary: Furyl- and thienylacrylates (8-14) and acrylic acids (8a,10a-14a) are prepared in moderate yields by palladium catalysed coupling of substituted bromofurans and bromothiophenes with ethylacrylate.
Keywords: FURYLACRYLATES, THIENYLACRILATES, DIACRYLATES, PALLADIUM, VINYLATION, BROMOFURANS, BROMOTHIOPHENES

Title: THE SYNTHESIS OF NEW HETEROPOLYCYCLIC QUINOLONE BY TWOFOLD PHOTOCYCLIZATION: METHOXYCARBONYLNAPHTOŠ2",1":2',3'-bĘTHIENOŠ4',5':2,3ĘTHIENOŠ5,4-cĘQUINOLIN- 6(5H)-ONE

Authors:
Karminski-Zamola, Grace (20316)
Pavličię, Davorka (177273)
Bajię, Miroslav (1543)
Blaževię, Nikola (4041)
Journal: HETEROCYCLES
Number: 12
Volume: 32
Year: 1991
Pages: from 2323 to 2327
Number of references: 8
Language: engleski
Summary: New heterocyclic ring system namely 12-methoxycarbonylnaphtoŠ2",1":2',3'-bĘthienoŠ4',5':2,3ĘthienoŠ5,4-cĘquinol in-6(5H)-one is prepared by multistep synthesis introducing twofold photochemical cyclization.
Keywords: NEW HETEROPOLYCYCLIC QUINOLONE, TWOFOLD PHOTOCYCLIZATION, DITHIENONAPHTOQUINOLONE

Title: TWOFOLD PHOTOCHEMICAL DEHYDROCYCLIZATION REACTION OF SUBSTITUTED 2,5-DISTYRYLTHIOPHENES AND 2,5-DISTYRYLFURANS

Authors:
Bajię, Miroslav (1543)
Karminski-Zamola, Grace (20316)
Blaževię, Nikola (4041)
Journal: CROATICA CHEMICA ACTA
Number: 4
ISSN: 0011-1643
Volume: 65
Year: 1992
Pages: from 835 to 846
Number of references: 10
Language: engleski
Summary: The photochemistry of 2,5-distyrylthiophenes and 2,5-distyrylfurans was investigated. DinaphtoŠ2,1-b:1',2'-dĘthiophene derivatives and dinaphtoŠ2,1-b:1',2'-dĘfuran derivative were detected as products of twofold photochemical dehydrocyclization. The mechanism of the twofold photochemical dehydrocyclization reaction is discussed.
Keywords: TWOFOLD PHOTOCHEMICAL DEHYDROCYCLIZATION, 2,5-DISTYRYLTHIOPHENES, 2,5-DISTYRYLFURANS, DINAPHTHOŠ2,1-b:1',2'-dĘTHIOPHENES, DINAPHTHOŠ2,1-b:1',2'-dĘFURANS

Title: MASS SPECTROMETRY OF SOME 2-STYRYL- AND 2,5-DISTYRYLFURAN AND -THIOPHENE DERIVATIVES

Authors:
Karminski-Zamola, Grace (20316)
Bajię, Miroslav (1543)
Blaževię, Nikola (4041)
Journal: ORGANIC MASS SPECTROMETRY
Volume: 27
Year: 1992
Pages: from 615 to 618
Number of references: 6
Language: engleski
Summary: Mass spectra fourteen 2-styryl- and 2,5-distyrylfuran and -thiophene derivatives are reported. The parent ion is the base peak for the styryl and distyryl derivatives, the distyryl species showed less fragmentation than the styryl species. In addition to simple bond cleavages, loss of formic acid or methyl formate was important in many of the species, presumably forming acetylenic fragments.
Keywords: MASS SPECTRAL FRAGMENTATION PATTERNS, 2-STYRYL- AND 2,5-DISTYRYLFURANS, 2-STYRYL- AND 2,5-DISTYRYLTHIOPHENES.

Title: 1H AND 13C-NMR STUDY OF NAPHTHOŠ2,1-bĘTHIOPHENE AND NAPHTHOŠ2,1-bĘFURAN DERIVATIVES

Authors:
Bajię, Miroslav (1543)
Karminski-Zamola, Grace (20316)
Klaię, Branimir
Journal: CROATICA CHEMICA ACTA
Number: 2
ISSN: 0011-1643
Volume: 67
Year: 1994
Pages: from 209 to 219
Number of references: 30
Language: engleski
Summary: A series of four substituted naphthoŠ2,1-bĘthiophenes and a series of five naphthoŠ2,1-bĘfurans have been studied using one- and two-dimensional 1H- and 13C-NMR methods. Chemical shifts of protons could not be assigned on the basis of the homonuclear correlation (COSY) spectra only, but two-dimensional nuclear Overhauser (NOESY) spectroscopy had to be used. Chemical shifts of substituted carbons were assigned using two-dimensional heteronuclear correlation (HETCOR) spectra.
Keywords: Two-dimensional 1H specrtoscopy, Overhauser (NOESY) spectroscopy, Naphthofurans and naphthothiophenes, Heteronuclear correlation (HETCOR) spectra

Title: PHOTOSYNTHESIS OF HETEROPOLYCYCLIC QUINOLONES

Authors:
Dogan, Jasna
Karminski-Zamola, Grace (20316)
Boykin, David W.
Journal: HETEROCYCLES
Number: 8
Volume: 41
Year: 1995
Pages: from 1659 to 1666
Number of references: 21
Language: engleski
Summary: Four new anilidoquinolones; 9-anilidobenzoŠbĘthienoŠ2,3-cĘquinolin-6(5H)-one, 9-N'-methylanilidobenzoŠbĘthienoŠ2,3-cĘ-5-N-methylquinolin-6-one, 9-anilidothienoŠ4,5-b'ĘthienylŠ2,3-cĘquinolin-6(5H)-one and 9-N'-methylanilidothienoŠ4,5-b'ĘthienylŠ2,3-cĘ-5-N-methylquinolin-6-one were prepared by photochemical dehydrohalogenation from the dianilides. Photochemical dehydrogenation of the anilides to produce multicondensed diquinolones did not occur.
Keywords: Photochemical dehydrohalogenation, Anilido-benzoŠbĘthieno-quinolones, Anilido-thieno-thienyl-quinolones

Title: MASS SPECTRAL FRAGMENTATION PATTERNS OF SOME NEW BENZOŠbĘTHIOPHENE- AND THIENOŠ2,3-bĘTHIOPHENE-2,5-DICARBONYLDICHLORIDES AND -DICARBONYLDIANILIDES AND ANILIDOQUINOLONES

Authors:
Karminski-Zamola, Grace (20316)
Dogan, Jasna
Boykin, David W.
Bajię, Miroslav (1543)
Journal: RAPID COMMUNICATIONS IN MASS SPECTROMETRY
Volume: 9
Year: 1995
Pages: from 282 to 288
Number of references: 10
Language: engleski
Summary: The electron impact mass spectra of some benzoŠbĘthiophene- and thienoŠ2,3-bĘthiophene-2,5-dicarbonyldichlorides, 2,5-dicarbonyldianilides, 9-anilido-benzoŠbĘthienylŠ2,3-cĘquinolones and 9-anilido-thienoŠ4,5-b'ĘthienylŠ2,3-cĘquinolones are discussed. Dominant peaks in dianilides are formed by cleavage of the C-N bond on one side of the anilido group, as well as on the anilido group itself in anilidoquinolones. These ions fragment further by the cleavage of a C-C bond in dianilides and the CONRPh group is lost directly, while the quinolonic part of the molecule in quinolones fragments with low probability. Characteristic fragment ions of dicarbonyldichlorides arise by the cleavage of the C-Cl bond.
Keywords: Mass spectra, Dichlorides, Dianilides, BenzoŠbĘthiophene- and thienoŠ2,3-bĘthiophene-2,5-dicarboxylic acids

Title: MASS SPECTRAL FRAGMENTATION PATTERNS OF SOME NEW 3,7-DICHLORO-BENZOŠ1,2-b:4,5-b'ĘDITHIOPHENE-2,6-DICARBOXYLIC ACID DIANILIDES AND 3,5-DICHLORO-DITHIENOŠ3,2-b:2',3'-dĘTHIOPHENE-2,6-DICARBOXYLIC ACID DIANILIDES. II

Authors:
Karminski-Zamola, Grace (20316)
Maleševię, Miroslav
Blaževię, Nikola (4041)
Bajię, Miroslav (1543)
Boykin, David W.
Journal: RAPID COMMUNICATIONS IN MASS SPECTROMETRY
Volume: 9
Year: 1995
Pages: from 400 to 404
Number of references: 9
Language: engleski
Summary: The electron impact mass spectra of some benzoŠ1,2-b:4,5-b'Ędithiophene-2,6-dicarboxylic acid dianilides and dithienoŠ3,2-b:2',3'-dĘthiophene-2,6-dicarboxylic acid dianilides are discussed.Dominant peaks in these dianilides are formed by the cleavage of a C-N bond on one side of an anilino group. These ions fragment further by the cleavage of a C-C bond on the other side of an anilino group and a CONRPhR' group may be lost directly. After loss of CO, the characteristic benzodithiophene radical cation at m/z 256 and dithienothiophene radical cation at m/z 262 are formed from their respective precursor compounds.
Keywords: Mass spectra, Dianilides, BenzoŠ1,2-b:4,5-b'Ędithiophene-dicarboxylic acid, DithienoŠ3,2-b:2',3'-dĘthiophene-dicarboxylic acid

Title: MASS SPECTRAL FRAGMENTATION PATTERNS OF SOME 2-METHYL-3-FURANCARBOXANILIDES AND 2-METHYL-3-FURANCARBOTHIOANILIDES. II

Authors:
Karminski-Zamola, Grace (20316)
Fišer-Jakię, Lelja
Bajię, Miroslav (1543)
Boykin, David W.
Journal: RAPID COMMUNICATIONS IN MASS SPECTROMETRY
Volume: 9
Year: 1995
Pages: from 778 to 780
Number of references: 17
Language: engleski
Summary: The electron impact mass spectra of some 2-methyl-3-furancarboxanilides and 2-methyl-3-furancarbothioanilides are discussed. Dominant peaks are formed by simple cleavage of a C-N bond in the anilides as well as in the thioanilides. Thioanilides show some additional fragmentation pathways recently reported which are not seen in the anilides.
Keywords: Mass spectra, Anilides, Thioanilides, 2-Methyl-3-furan-carboxylic acid

Title: MASS SPECTRA OF DICARBOXYLIC ACID DIANILIDES III. FURAN-BASED COMPOUNDS

Authors:
Karminski-Zamola, Grace (20316)
Fišer-Jakię, Lelja
Bajię, Miroslav (1543)
Boykin, David W.
Journal: RAPID COMMUNICATIONS IN MASS SPECTROMETRY
Volume: 9
Year: 1995
Pages: from 781 to 782
Number of references: 8
Language: engleski
Summary: The main fragmentation pathways in the mass spectra of five 3,4-furan-dicarboxylic acid dianilides are presented and discussed.
Keywords: Mass spectra, 3,4-Furan-dicarboxylic acid dianilides

Title: SYNTHESIS OF 2,4-BIS(4-(5-AMIDINO AND 5-SUBSTITUTEDAMIDINO-2-BENZIMIDAZOYL)PYRIMIDINES

Authors:
Bajię, Miroslav (1543)
Boykin, David W.
Journal: HETEROCYCLIC COMMUNICATIONS
Number: 4
Volume: 1
Year: 1995
Pages: from 225 to 230
Number of references: 8
Language: engleski
Summary: The synthesis of 2,4-bisŠ4-(5-imidazolin-2yl-2-benzimidazolyl)phenylĘpyrimidine, 2,4-bisŠ4-(5-amidino-2-benzimidazolyl)phenylĘpyrimidine and 2,4-bisŠ4-(5-N-isopropylamidino-2-benzimidazolyl)phenylĘpyrimidine from 2,4-bis-(4-cyanophenyl)pyrimidine are reported.
Keywords: Synthesis, 2,4-Bis(amidino-benzimidazolyl)pyrimidines

Title: COMPOSITION OF THE ESSENTIAL OIL OF Vitex agnus-castus L.

Authors:
Kuštrak, Danica
Kuftinec, Josip
Blaževię, Nikola (4041)
Journal: JOURNAL OF ESSENTIAL OIL RESEARCH
Volume: 6
Year: 1994
Pages: from 341 to 344
Number of references: 9
Language: engleski
Summary: Oils of Vitex agnus-castus L., which were obtained by hydrodestillation of the leaves, flowers and fruits, were analyzed by capillary GC.
Keywords: Vitex agnus-castus, Verbenaceae, Chaste tree, Essential oil composition, 1,8-cineole, Limonene, Sabinene, Pinene

Title: TRITERPENIC ACIDS FROM Micromeria thymifolia (SCOP.) FRITSCH

Authors:
Kalogjera, Zdenka
Blaževię, Nikola (4041)
Vladimir, Sanda
Romię, Željko
Journal: ACTA PHARMACEUTICA
Number: 2
Volume: 44
Year: 1994
Pages: from 193 to 196
Number of references: 6
Language: engleski
Summary: A mixture of triterpenic acids was isolated from an extract of the overground parts of Micromeria thymifolia. The HPLC revealed that the mixture consisted of ursolic and oleanolic acids. Triterpenic acids were separated by GC after being transformed into TMS derivatives. The identity of ursolic and oleanolic acids was confirmed by the mass spectra of their TMS derivatives.
Keywords: Micromeria thymifolia, Triterpenic acids, Ursolic acid, Oleanolic acid

Title: SYNTHESIS AND FLUORESCENT PROPERTIES OF SOME NEW UNSYMMETRIC bis-BENZOTHIAZOLYL FURANS AND THIOPHENES

Authors:
Racane, Livio
Tralię-Kulenovię, Vesna
Karminski-Zamola, Grace (20316)
Fišer-Jakię, Lelja
Journal: MONATSHEFTE FUR CHEMIE
Volume: 126
Year: 1995
Pages: from in to press
Number of references: 20
Language: engleski
Summary: Some new mono- and bis-benzothiazolyl compounds with furan or thiophene nuclei were synthesized my multistep reactions from zhe corresponding furan and thiophene aldehydes. The data obtained from emission spectra show a large influence of the benzothiazole rings on the relative quantum efficiency of the compounds under investigation.
Keywords: Fluorescent properties, Unsymmetric bis-benzothiazoles, Furans, thiophenes

Title: ELECTRON IMPACT MASS SPECTRA OF SOME 1-(2-FURYL)- AND 1-(2-THIENYL)-2-(2-BENZOTHIAZOLYL)ETHENES

Authors:
Karminski-Zamola, Grace (20316)
Tralię-Kulenovię, Vesna
Fišer-Jakię, Lelja
Bajię, Miroslav (1543)
Boykin, David W.
Journal: RAPID COMMUNICATIONS IN MASS SPECTROMETRY
Volume: 9
Year: 1995
Pages: from in to press
Number of references: 15
Language: engleski
Summary: The electron impact mass spectra of some 1-(2-furyl)- and 1-(2-thienyl)-2-(2-benzothiazolyl)ethenes have been recorded and the identity of various ions in the mass spectra established. The compounds examined exhibit two main fragmentation routes. On one hand, fragmentation of the furan and thiophene nuclei and the formation of cyclopropenylethyne cations with very significant abundance and on the other hand, fragmentation of the benzothiazole nuclei on the characteristic pathways.
Keywords: Mass spectra, 2-furyl- and 2-thienyl-benzothiazoles, Cyclopropenyl-ethyne cation

Title: SYNTHESYS AND MASS SPECTRAL FRAGMENTATION PATTERNS OF SOME NEW HETEROCYCLIC BIS-CARBOXAMIDES

Authors:
Karminski-Zamola, Grace (20316)
Crnjak, Andrina
Bajię, Miroslav (1543)
Journal: RAPID COMMUNICATIONS IN MASS SPECTROMETRY
Volume: 9
Year: 1995
Pages: from in to press
Number of references: 11
Language: engleski
Summary: The electron impact mass spectra of some newly synthesized heteropolycyclic bis-carboxamides are discussed. The dominant peaks in all these spectra are formed by the cleavage of the C-N bond on one side of the anilino group with the formation of a fragment ion C9H4OSCl+ m/z 195, as the base peak. Cleavage of the C-N bond with charge retention on nitrogen leads to characteristic ions in some cases.
Keywords: Synthesis, Mass spectra, Phenylen-bis-benzoŠbĘthiophene-carboxamides

Title: PHOTOSYNTHESIS OF NEW HETEROPOLYCYCLIC FUROLACTONES FROM E,E-2,5-DI-(2-CARBOXYSTYRYL)FURAN

Authors:
Bajię, Miroslav (1543)
Karminski-Zamola, Grace (20316)
Journal: CROATICA CHEMICA ACTA
Number: 1
ISSN: 0011-1643
Volume: 69
Year: 1996
Pages: from in to press
Number of references: 11
Language: engleski
Summary: New heteropolycyclic furolactones; 2-(2-carboxystyryl)-6-phenyl-7a-methoxy-3a,7a-dihydrofuroŠ3,2-bĘpyran-5-one and 6-phenyl-2,3-epoxy-2,3-dihydrofuroŠ3,2-bĘpyran-5-one were prepared by photochemical dehydrocyclyzation reaction of E,E-2,5-di-(2-carboxystyryl)furan.
Keywords: Photochemical dehydrocyclization, Heteropolycyclic compounds, Furolactones

Title: PHOTOSYNTHESIS OF HETEROPOLYCYCLIC DIQUINOLONES TWOFOLD PHOTODEHYDROHALOGENATION REACTION OF BENZOŠ1,2-b:4,5-b'ĘDITHIOPHENE- AND DITHIENOŠ3,2-b:2',3'-dĘTHIOPHENEDICARBOXANILIDES

Authors:
Maleševię, Miroslav
Karminski-Zamola, Grace (20316)
Bajię, Miroslav (1543)
Boykin, David W.
Journal: HETEROCYCLES
Number: 12
Volume: 41
Year: 1995
Pages: from in to press
Number of references: 21
Language: engleski
Summary: Heteropolycyclic diquinolones are prepared by twofold photochemical dehydrohalogenation reaction of corresponding benzodithiophene- and dithienothiophenedicarboxanilides. The products of onefold photochemical dehydrohalogenation reaction, anilidoquinolones were also isolated to prove the mechanism of the reaction.
Keywords: Twofold Photodehydrohalogenation, Benzo-dithieno diquinolones, Dithieno-thienyl-diquinolones


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