[Studies on the chemical constituents of Cynanchum thesioides]

Fourteen constituents were isolated from Cynanchum thesioides (Freyn) K. Schum. On the basis of chemical and spectral data, seven of them have been identified including two new compounds: glyceride-1,3-dipalmito-2-sorbate (4), and thesoideaside (7); and five known compounds: beta-amyrin acetate (I), lupeol acetate (2), alpha-amyrin caprylate (3), tamarixetin (5) and tamarixetin-3-O-beta-D-galacto-pyranoside (6).