You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 8-(2-hydroxyacetyl)-3-[2-[methyl(2-phenylethyl)amino]ethyl]-1-oxa-3,8-diazaspiro[4.5]decan-2-one ?
user
C20H29N3O4
assistant