2-[(4-Methoxyphenyl)methyl]-3,5-dioxo-2,9-diazaspiro[5.5]undecan-9-yl 2,2-dimethylpropanoate2-[(4-Methoxyphenyl)methyl]-3,5-dioxo-2,9-diazaspiro[5.5]undecan-9-yl 2,2-dimethylpropanoate
