9-Cbz-2-oxo-3-oxa-1,9-diaza-spiro[5.5]undecane; benzyl 2-oxo-3-oxa-1,9-diazaspiro[5.5]undecane-9-carboxylate; 9-Cbz-2-oxo-3-oxa-1,9-diaza-spiro[5.5]undecane - X7207;