A new steroidal saponin named nocturnoside A has been isolated from the methanolic extract of the... more A new steroidal saponin named nocturnoside A has been isolated from the methanolic extract of the fresh leaves of Cestrum nocturnum and has been characterized by 13C NMR spectroscopy to be 3-O-[beta-D-glucopyranosyl(1----3)-beta-D-glucopyranosyl(1----2)-beta-D- glucopyranosyl((3----1)-beta-D-xylopyranosyl)(1----4)-beta-D- galactopyranosyl) (25R)-spirost-5-ene-2 alpha,3 beta-diol.
A new triterpenoid saponin, macrophyllicin has been isolated from the methanolic extract of the w... more A new triterpenoid saponin, macrophyllicin has been isolated from the methanolic extract of the whole plant of Primula macrophylla. On the basis of chemical and spectral evidence, the structure of macrophyllicin was determined as 3-O-[alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranosyl- (1-->2)-beta-D-galactopyranosyl-(1-->2)-beta-D-glucuronopyranosyl] -6 beta,16 alpha,28-trihydroxy-olean-12-ene. The 2D NMR experiments were useful in providing complete information on the structure of macrophyllogenin, a new sapogenin.
A new steroidal saponin named nocturnoside A has been isolated from the methanolic extract of the... more A new steroidal saponin named nocturnoside A has been isolated from the methanolic extract of the fresh leaves of Cestrum nocturnum and has been characterized by 13C NMR spectroscopy to be 3-O-[beta-D-glucopyranosyl(1----3)-beta-D-glucopyranosyl(1----2)-beta-D- glucopyranosyl((3----1)-beta-D-xylopyranosyl)(1----4)-beta-D- galactopyranosyl) (25R)-spirost-5-ene-2 alpha,3 beta-diol.
Abstract Two new steroidal glycosides, parquisoside A (1) and B (2) were isolated from the aerial... more Abstract Two new steroidal glycosides, parquisoside A (1) and B (2) were isolated from the aerial parts of Cestrum parqui (family Solanaceae). Their common aglycone is a new steroid of the spirostane series, which we name parquigenin. It has the structure (3β, 24S, 25S)- ...
A new monodesmosidic spirostanol glycoside extracted from the fresh leaves of Cestrum nocturnum w... more A new monodesmosidic spirostanol glycoside extracted from the fresh leaves of Cestrum nocturnum was identified as spirost-5-ene-3-ol, [3β,25R]-3-O-[{α-L-rhamnopyranosyl-(1→4)- α-L-rhamnopyranosyl-(1→2)}-α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranoside. The name proposed for this saponin is nocturnoside B. The structure elucidation was done on the basis of 1 D and 2 D spectroscopic studies [DEPT. HeteroCOSY, HMBC, COSY-45°, HOHAHA ] and chemical analysis.
A new steroidal saponin named nocturnoside A has been isolated from the methanolic extract of the... more A new steroidal saponin named nocturnoside A has been isolated from the methanolic extract of the fresh leaves of Cestrum nocturnum and has been characterized by 13C NMR spectroscopy to be 3-O-[beta-D-glucopyranosyl(1----3)-beta-D-glucopyranosyl(1----2)-beta-D- glucopyranosyl((3----1)-beta-D-xylopyranosyl)(1----4)-beta-D- galactopyranosyl) (25R)-spirost-5-ene-2 alpha,3 beta-diol.
A new triterpenoid saponin, macrophyllicin has been isolated from the methanolic extract of the w... more A new triterpenoid saponin, macrophyllicin has been isolated from the methanolic extract of the whole plant of Primula macrophylla. On the basis of chemical and spectral evidence, the structure of macrophyllicin was determined as 3-O-[alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranosyl- (1-->2)-beta-D-galactopyranosyl-(1-->2)-beta-D-glucuronopyranosyl] -6 beta,16 alpha,28-trihydroxy-olean-12-ene. The 2D NMR experiments were useful in providing complete information on the structure of macrophyllogenin, a new sapogenin.
A new steroidal saponin named nocturnoside A has been isolated from the methanolic extract of the... more A new steroidal saponin named nocturnoside A has been isolated from the methanolic extract of the fresh leaves of Cestrum nocturnum and has been characterized by 13C NMR spectroscopy to be 3-O-[beta-D-glucopyranosyl(1----3)-beta-D-glucopyranosyl(1----2)-beta-D- glucopyranosyl((3----1)-beta-D-xylopyranosyl)(1----4)-beta-D- galactopyranosyl) (25R)-spirost-5-ene-2 alpha,3 beta-diol.
Abstract Two new steroidal glycosides, parquisoside A (1) and B (2) were isolated from the aerial... more Abstract Two new steroidal glycosides, parquisoside A (1) and B (2) were isolated from the aerial parts of Cestrum parqui (family Solanaceae). Their common aglycone is a new steroid of the spirostane series, which we name parquigenin. It has the structure (3β, 24S, 25S)- ...
A new monodesmosidic spirostanol glycoside extracted from the fresh leaves of Cestrum nocturnum w... more A new monodesmosidic spirostanol glycoside extracted from the fresh leaves of Cestrum nocturnum was identified as spirost-5-ene-3-ol, [3β,25R]-3-O-[{α-L-rhamnopyranosyl-(1→4)- α-L-rhamnopyranosyl-(1→2)}-α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranoside. The name proposed for this saponin is nocturnoside B. The structure elucidation was done on the basis of 1 D and 2 D spectroscopic studies [DEPT. HeteroCOSY, HMBC, COSY-45°, HOHAHA ] and chemical analysis.
Uploads
Papers by Fehmida Baqai