Studies on chemical constituents from leaves of Diplopanax stachyathus

Object To study the chemical constituents from leaves of Diplopanax stachyathus Hand Mazz aiming at searching for bioactive natural products Methods The compounds Ⅰ-Ⅹ were isolated by a combination of Sephedex LH 20 and silica gel column chromatographies, and their structures were identified by spectral methods Results Ten known compounds were isolated from leaves of D stachyathus Their structures were identified by means of spectroscopic analysis as: β sitosterol (Ⅰ), betulinic acid (Ⅱ), oleanolic acid (Ⅲ), ursolic acid (Ⅳ), daucossterol (Ⅴ), quercetin 3 O β D glucopyranoside (Ⅵ), 3,3′,4′ tri O methyellagic acid (Ⅶ), 3, 3′ di O methylellagic acid 4 O β D xylopyranoside (Ⅷ), 3′ O methylellagic acid 4 O β D xylopyranoside (Ⅸ), and 3, 3′,4′ tri O methylellagic acid O β D glucopyranoside (Ⅹ) Conclusion Compounds Ⅰ-Ⅵ and Ⅸ are isolated from this plant for the first time