5,7-ditert-butyl-3,3-dimethyl-1H-indol-2-one

methyl (5,7-di-tert-butyl-3,3-dimethyl-3H-indol-2-yl)glyoxylate

dimethyl (5,7-di-tert-butyl-3,3-dimethyl-2-indolinyl)oxalacetate

dimethyl rel(2R,3aS,9S,10S)-5,7-di-tert-butyl-3,3a-dihydro-3,3-dimethyl-3a,2-(epoxyethano)-2H-indole-9,10-dicarboxylate