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 1-[(4-methoxyphenyl)methyl]-3-[2-[2-methyl-2-(3-methylphenyl)propanoyl]-2-azaspiro[3.3]heptan-6-yl]urea .
user
C26H33N3O3
assistant