(3aS,8aS)-2,2-dimethyl-4,4,8,8-tetraphenyl-4,5,6,7,8,8a-hexahydro-3aH-1,3-dioxolo(4,5-e)(1,3)diazepin-6-one
(3as,8as)-2,2-dimethyl-4,4,8,8-tetraphenyl-4,5,6,7,8,8a-hexahydro-3ah-1,3-dioxolo(4,5-e)(1,3)diazepin-6-one