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 (5S,8S)-N-cyclopropyl-6-ethyl-8-phenyl-9-oxa-2,6-diazaspiro[4.5]decane-2-carboxamide .
user
C19H27N3O2
assistant