CCc1ccccc1NC(=O)Oc2ccc3c(c2)[C@]4(CC[N@+]([C@@H]4[N@]3C)(C)[O-])C GSG 1S,3AS,8AS-TRIMETHYL-1-OXIDO-1,2,3,3A,8,8A-HEXAHYDROPYRROLO[2,3-B]INDOL-5-YL 2-ETHYLPHENYLCARBAMATE