英文别名ethyl 2-methylene-5-oxotetrahyro-1H-pyrrolizine-7a(5H)-carboxylate; 1H-Pyrrolizine-7a(5H)-carboxylic acid, tetrahydro-2-methylene-5-oxo-, ethyl ester; ethyl 6-methylene-3-oxo-1,2,5,7-tetrahydropyrrolizine-8-carboxylate; Ethyl 2-methylene-5-oxotetrahydro-1H-pyrrolizine-7a(5H)-carboxylate 
