You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[4-(3-aminopropyl)-3-ethyl-5-methylphenyl]-1-(3-ethyl-5,5-dimethyl-6,7-dihydro-4H-2-benzothiophen-1-yl)propan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H39NOS
assistant