Abstract: From the whole plant of Gymnema yunnanense Tsiang, two new Czi steroidal glycosides named gymnemaroside A(I) and B(II) were isolated. On the basis of che-mical and spectral evidence, their structures were elucidated as penupogenin 3-O-β-D-glucopyranosyl- (1 -4 )- 3 -O-methyl- 6 -deoxy-β-D-allopyranosyl- (1-4) -β-D-cymaropyranosyl-( 1-4 )-β-D-cymaropyranoside and gymnemarsgenin 3-O-β-D-gluco -pyranosyl-( 1-4 )-3-O-methyl-6-deoxy-β-D-allopyranosyl-( 1-4)-β-D-cymaropyran -osyl-( 1-4 )-β-D-cymaropyranoside, respectively.

Key words: Gymnema yunnanense