You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2Z,4E)-3-[4-(3,3-diphenylpropanoyl)piperazin-1-yl]-2-(3-ethoxypropylamino)-7-methyl-8-(2-phenylethyl)cycloocta-2,4-dien-1-one by IUPAC nomenclature, provide its molecular formula.
user
C41H51N3O3
assistant