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 5-[4-(cyclopropylmethyl)-2-oxo-3-oxa-1,8-diazaspiro[4.5]decan-8-yl]-3-(1-methylpyrazol-4-yl)pyrazine-2-carbonitrile ?
user
C20H23N7O2
assistant