(1R,5S,6R)-6-(羟基甲基)-3-氮杂双环[3.1.0]己烷-3-羧酸叔丁酯

(1R,5S,6r)-3-tert-butyl 6-ethyl 3-azabicyclo[3.1.0]hexane-3,6-dicarboxylate

(1R,5S,6R)-2,4-二氧代-3-氧杂双环[3.1.0]己烷-6-羧酸

(1R,5S,6r)-3-benzyl-2,4-dioxo-3-azabicyclo[3.1.0]hexane-6-carboxylic acid

ethyl 5-benzyl-4,6-dioxo-3a,6a-dihydro-1H-pyrrolo[3,4-c]pyrazole-3-carboxylate