Folotsoside A, a New Pregnane Glycoside from Folotsia sarcostemmoides

From the aerial parts of Folotsia sarcostemmoides, a new pregnane ester triglycoside designated as folotsoside A [1] was isolated, accompanied by paeonol (2-hydroxy-4-methylacetophenone). The structure of folotsoside A was established as 12-O-benzoyl-lineolon 6-desoxy-3-O-methyl-beta-D-allopyranosyl-(1 --> 4)-beta-D-cymaropyranosyl-(1 --> 4)-beta-D-cymaroside on the basis of chemical and spectroscopic evidence.