dimethyl (1α,2β,4β,5α)-3,3-diphenyl-6,7-diazatricyclo<3.2.0.02,4>heptane-6,7-dicarboxylate

dimethyl (1α,2β,4β,5α)-3-fluorenylidene-6,7-diazatricyclo<3.2.0.02,4>heptane-6,7-dicarboxylate