Three Minor Flavone Glycosides from Aeschynanthus Species and Cultivars (Gesneriaceae)

Abstract

Three minor flavonoids were isolated from the corollas and leaves of Aeschynanthus species and cultivars using MeOH, and identified as scutellarein 7- O-(6″-methylglucuronopyranoside) (1), 6-hydroxyluteolin 7- O-(6″-methylglucuronopyranoside) (2) and nepetin 4′- O-glucuronopyranoside (3) by UV and 1H NMR spectroscopy, LC–MS, and acid hydrolysis. These flavone glycosides are reported in nature for the first time.