You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-[(2-tert-butylphenoxy)methyl]-4-ethoxyphenyl]-[4-(3-chlorophenyl)piperazin-1-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C30H35ClN2O3
assistant