M. Ilyas

TWO FLAVONOL GLYCOSIDES FROM CHENOPODIUM AMBROSIOIDES

Abstract Two new flavonol glycosides, kaempferol 3-rhamnoside-4′-xyloside and kaempferol 3-rhamnoside-7-xyloside along with kaempferol, isorhamnetin and quercetin have been identified from the fruits of Chenopodium ambrosioides . Their structures were established using spectroscopic and chemical evidence.

Neriifolione, a triterpene from Euphorbia neriifolia

Abstract A novel triterpene, 9,19-cyclolanost-20(21)-en-24-ol-3-one, named neriifolione, and cycloartenol were isolated from the latex of Euphorbia neriifolia . Their structures were elucidated with the help of chemical and physical data ( 1 H NMR, 13 C NMR, IR and mass spectra).

Note: A new chromone from Ficus lyrata

A new chromone, named 5,6-dihydroxy-2-methylchromone (FL-2), along with seven known flavonoids, 5-hydroxy-7,3,3′,4′-tetramethoxyflavone (FL-3), 5,4′-dihydroxy-6,7,8-trimethoxyflavone (FL-4), 5,4′-dihydroxy-7,8-dimethoxyflavone (FL-5), 4-methoxychalcone (FL-6), 7,4′-dimethoxyapigenin (FL-7), 5,7,4′-trihydroxy-2′,3′,6′-trimethoxyisoflavone (FL-8 a rare flavonoid), acacetin-7-O-glucoside (FL-9) and acacetin-7-O-neohesperidoside (FL-10), and β-sitosterol-d-glucoside (FL-1) have been isolated from the leaves of Ficus lyrata. Their structures have been established on the basis of chemical and spectral evidence (IR, UV, 1H NMR, 13C NMR and mass spectra).

Myricetin 3′-rhamnoside-3-galactoside from Buchanania lanzan (anacardiaceae)

Abstract A new glycoside, myricetin 3′-rhamnoside-3-galactoside, has been isolated from leaves of Buchanania lanzan . Its structure was established from spectroscopic and chemical evidence.

Flavonoids from Acacia tortilis

A novel isoflavone, 5,7-dihydroxy-4′- p-methyl benzyl isoflavone 1a, and three known flavonoids apigenin, luteolin and quercetin have been isolated from the leaves of Acacia tortilis. Their structures were elucidated by chemical and physical data (IR, UV, 1H-NMR, 13C-NMR and MS spectra).

A new Biflavonoid from Leaves of Garcinia Nervosa

The isolation of a new biflavonoid, identified as I-3, II-3, I-5, II-5, I-7, II-7, I-4′, II-4′-octahydroxy [I-2′, II-2′] biflavone, from the leaves of Garcinia nervosa is reported. The structure was established by chemical and physical means (IR, UV, 1H-NMR, 13C-NMR data).

A biflavonoid from Garcinia nervosa

Abstract A new biflavonoid has been isolated from the leaves of Garcinia nervosa . Its structure I-5, II-5, I-7, II-7, I-3′, I-4′, II-4′-heptahydroxy-[I-3, II-8]-flavanonylflavone was elucidated with the help of chemical and spectral methods.

A coumarin fromSetaria italica

Abstract A new coumarin named setarin has been isolated from the leaves ofSetaria italica and its structure elucidated as 4-propenoxycoumarin on the basis of spectral and chemical analysis.

9-Hydroxy-2,2,6,7-tetramethyl-2H-[1]-benzopyran-(1-phenylethylene-10-yl)-[3,2-b]-dihydropyran-4-one from Calophyllum tomentosum

Abstract A new compound, 9-hydroxy-2,2,6,7-tetramethyl-2H-[1]-benzopyran-(1-phenylethylene-10-yl)-[3,2-b]-dihydropyran-4-one, has been isolated from the leaves of Calophyllum tomentosum . Its structure was established with the help of spectroscopic and chemical methods.

8,3′-Dimethoxy-5,4′-dihydroxyflavone 7-glucoside from Setaria italica

Abstract A new flavone glycoside has been isolated from the leaves of Setaria italica and identified as 8,3′-dimethoxy-5,4′-dihydroxyflavone 7-glucoside by chemical and spectral studies.