Synonyms: 2,7-diazaspiro[3.5]nonane-7-carboxylic acid, 1,1-dimethylethyl ester, hydrochloride (1:1);tert-Butyl-2,7-diazaspiro[3.5]nonan-7-carboxylathydrochlorid;tert-Butyl 2,7-diazaspiro[3.5]nonane-7-carboxylate hydrochloride (1:1);2,7-Diazaspiro[3.5]nonane-7-carboxylic acid 1,1-dimethylethyl ester hydrochloride