2-cyclopropyl-1-[(4-fluorophenyl)sulfonyl]-5-nitro-1,2,2',3',5',6'-hexahydrospiro[indole-3,4'-thiopyran] 1',1'-dioxide

2-cyclopropyl-1-[(4-fluorophenyl)sulfonyl]-1,2,2',3',5',6'-hexahydrospiro[indole-3,4'-thiopyran]-5-amine 1',1'-dioxide

(S)-N-(2-chlorobenzyl)-2-cyclopropyl-1-[(4-fluorophenyl)sulfonyl]-1,2,2',3',5',6'-hexahydrospiro[indole-3,4'-thiopyran]-5-carboxamide

(R)-N-(2-chlorobenzyl)-2-cyclopropyl-1-[(4-fluorophenyl)sulfonyl]-1,2,2',3',5',6'-hexahydrospiro[indole-3,4'-thiopyran]-5-carboxamide