Flavonoids of Dikamali: A phytochemical reinvestigation

Abstract

Eleven known flavonoids (1–11) were isolated from Dikamali, the gum resin of Gardenia lucida. Three of them, desmethylnobiletin, pectolinarigenin and xanthomicrol, are a new report from this source. Nuclear magnetic resonance (NMR) data are being given for all the isolates. For two of them, viz., 3′,4′-dimethoxywogonin and 4′-hydroxywogonin, such data have not been reported in literature. Furthermore, correct NMR data are being provided for gardenin C as the data reported in literature were found to be incorrect.

Keywords::

• Gardenin C
• 3′
• 4′-dimethoxywogonin
• 4′-hydroxywogonin
• NMR assignments
• Flavonoids
• Dikamali

Acknowledgement

The authors wish to thank Prabhakar A.S. for his technical assistance.