6-Epiphysalin G is isolated from natural
Physalis alkekengi var. francheti.[1].
References
[1] Bunsho Makino, et al. Physalins Possessing an Endoperoxy Structrue from Physalis alkekengi var. francheti. Structural Revision of Physalin K. Bull.Chem. 1995, 68:219-226.