You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4S,5S)-7-benzyl-2-(3-methylcyclobutanecarbonyl)-4-(2-propan-2-ylpyrazol-3-yl)-2,7-diazaspiro[4.5]decan-6-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H36N4O2
assistant