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 4-[[3-[(3-fluorophenyl)methyl]imidazol-4-yl]methyl]-5-(2-methylsulfanylethyl)-3-[(2-nitrophenyl)methyl]-1-phenylpiperazin-2-one .
user
C31H32FN5O3S
assistant