methyl (2R,3aR,8aR)-3a-allyl-1-((2R,3aS,8aS)-8-allyl-3a-methyl-1-(2,2,2-trifluoroacetyl)-1,2,3,3a,8,8a-hexahydropyrrolo[2,3-b]indole-2-carbonyl)-8-methyl-1,2,3,3a,8,8a-hexahydropyrrolo[2,3-b]indole-2-carboxylate