You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-(4-methylpiperazin-1-yl)-4-[4-(trifluoromethyl)phenyl]sulfonyl-5,6,7,8-tetrahydroquinazoline ?
user
C20H23F3N4O2S
assistant