A new iridoid glycoside from leaves of Callicarpa nudiflora / 中草药

ABSTRACT

Objective To study the chemical constituents of the leaves of Callicarpa nudiflora. Methods The chemical constituents were isolated and purified by column chromatography on silica gel, MPLC, and PHPLC. Their structures were elucidated on the basis of physicochemical properties and spectroscopic analysis. Results Five compounds were isolated from the leaves of C. nudiflora and elucidated as 6’-O-caffeoyl-ajugol (1), luteolin (2), 5,4’-dihydroxy-3,7,3’-trimethoxyflavone (3), luteolin-4’-O-(6’’-E-caffeoyl)- β-D-glucopyranoside (4), and 2α,3α,19α,23-tetrahydroxyurs-12-en-28-ursolic acid (5). Conclusion Compound 1 is a new compound named nudifloside A1.