You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-[[(4S)-9-benzyl-1-oxa-9-azaspiro[5.5]undecan-4-yl]-ethylamino]-N-(3,5-dimethyl-1H-pyrazol-4-yl)acetamide .
user
C25H37N5O2
assistant