R. Sunayama et al., PHYSALIN AND NEOPHYSALINS FROM PHYSALIS-ALKEKENGI VAR FRANCHETI AND THEIR DIFFERENTIATION-INDUCING ACTIVITY, Phytochemistry, 34(2), 1993, pp. 529-533
A methanol extract of Physalis alkekengi var.francheti showed a potent
cell differentiation inducing activity toward mouse myeloid leukemia
cell line (M1 cells). From the extract, a new physalin and two new neo
physalins, 25,27-dihydro-4,7-didehydro-7-deoxyneophysalin A and 4,7-di
dehydroneophysalin B, were isolated along with physalin A, L and isoph
ysalin B. The structures of physalins and neophysalins were determined
by means of NMR, UV, IR and mass spectra. Of these compounds, physali
n A showed potent cell differentiation inducing activity.