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 ethyl N-[(17-benzoyl-5,13-dihydroxy-6,10-dimethyl-5-tricyclo[13.2.2.02,6]nonadeca-1(17),9,15,18-tetraenyl)methyl]-N-benzylcarbamate .
user
C39H47NO5
assistant