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

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. [ABSTRACT FROM AUTHOR]