You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 3-tert-butyl-12-methyl-11-[(4-octanoylcyclohexa-1,3-dien-1-yl)methyl]-8-(2-phenylethyl)-7-azaspiro[5.6]dodec-7-en-9-one ?
user
C39H57NO2
assistant