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 (Z)-but-2-enedioic acid;1-(8-methoxy-3-methylsulfanyl-5,6-dihydrobenzo[b][1]benzothiepin-5-yl)-4-methylpiperazine .
user
C25H30N2O5S2
assistant