[Studies on the chemical constituents of Euonymus mupinensis]

Eight compounds have been isolated from Euonymus mupinensis. Their structures were identified by means of physico-chemical and spectral analysis. They are wilforlide A (I), wilforlide B (II), olean-12-en-3,29-diol (III), olean-3-oxo-29-ol (IV), stigmastan-3-one (V), stigmastan-3,6-dione (VI), beta-sistosterol (VII) and beta-sistosterol-3-O-beta-D-glucopyranoside (VIII). Compound IV is a new compound, named as mupinensisone. Compounds I-VIII were isolated for the first time from this plant. 13C-NMR chemical shifts of compounds V and VI were assigned for the first time.