1,2,3-環丙烷三甲酸

trans,meso-cyclopropanetricarboxylic acid triethyl ester

(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

exo-N-benzyl-3-azabicyclo[3.1.0]hexane-6-methanol