(1R-exo)-8-Methyl-2,4-dioxo-3-(phenylmethyl)-3,8-diazabicyclo<3.2.1>octane-6-carboxylic acid ethyl ester
5-(Phenylmethyl)-3a,6a-dihydro-1-methylpyrrolo<3,4-d>-1,2,3-triazole-4,6(1H,5H)-dione
<3aS<1<1S*,5R*,6R*>,3aα,6α,7aβ>>-Hexahydro-8,8-dimethyl-1-<<8-methyl-2,4-dioxo-3-(phenylmethyl)-3,8-diazabicyclo<3.2.1>oct-6-yl>carbonyl>-3H-3a,6-methano-2,1-benzisothiazole 2,2-dioxide
<3aS<1<1R*,5R*,6R*>,3aα,6α,7aβ>>-Hexahydro-8,8-dimethyl-1-<<8-methyl-2,4-dioxo-3-(phenylmethyl)-3,8-diazabicyclo<3.2.1>oct-6-yl>carbonyl>-3H-3a,6-methano-2,1-benzisothiazole 2,2-dioxide
6-Methyl-3-(phenylmethyl)-3,6-diazabicyclo<3.1.0>hexane-2,4-dione