You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance tert-butyl 2-[(1-phenylmethoxycarbonylpiperidin-3-yl)amino]-1-oxa-5-azaspiro[2.3]hexane-5-carboxylate .
user
C22H31N3O5
assistant