甲基(2aR,2bR,4aS,4bS)-2-氧代六氢-1-氮杂环丙烷[Cd]并环戊二烯-4A(1H)-羧酸酯

(2aR,2a1S,2bR,4aS)-1-tert-butyl 4a-methyl 2-oxohexahydro-1-azacyclopropa[cd]pentalene-1,4a(2a1H)-dicarboxylate

(1S,2S,5R,6R)-dimethyl 2-((tert-butoxycarbonyl)amino)bicyclo[3.1.0]hexane-2,6-dicarboxylate

(2aR,2a1S,2bR,4aS)-methyl 1-(4-methoxybenzyl)-2-oxooctahydro-1-azacyclopropa[cd]pentalene-4a-carboxylate