New Flavonoids and Turkesterone-2-O-Cinnamate from Leaves of Rhaponticum uniflorum

摘要

Leaves of Rhaponticum uniflorum (L.) DC. (Asteraceae) afforded 46 compounds including seven new flavonoids that were identified using UV, IR, and NMR spectroscopy and mass spectrometry as 6-hydroxyluteolin-7-O-(2-O-caffeoyl)--D-glucopyranoside (rhaunoside A, 1), 6-hydroxyluteolin-7-O-(6-O-cinnamoyl)--D-glucopyranoside (rhaunoside B, 2), 6-hydroxyluteolin-4-O--D-glucopyranoside (rhaunoside C, 3), nepetin-7-O-(6-O-caffeoyl)--D-glucopyranoside (rhaunoside D, 4), nepetin-7-O-(6-O-cinnamoyl)--D-glucopyranoside (rhaunoside E, 5), nepetin-3-O--D-glucopyranoside (rhaunoside F, 6), and luteolin-7-O-(2-O-caffeoyl)--D-glucopyranoside (rhaunoside G, 7) and the new ecdysteroid turkesterone-2-O-cinnamate (8).