英文同义词
3-Azaspiro[5.5]undecane-9-acetic acid, 3-[(1,1-diMethylethoxy)carbonyl]-, Methyl ester;9-Methoxycarbonylmethyl-3-aza-spiro[5.5]undecane-3-carboxylic acid tert-butyl ester;tert-butyl 9-(2-methoxy-2-oxoethyl)-3-azaspiro[5.5]undecane-3-carboxylate