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 6-(5-chlorothiophen-2-yl)-9-thiophen-2-yl-5,6,8,9,10,11-hexahydrobenzo[b][1,4]benzodiazepin-7-one .
user
C21H17ClN2OS2
assistant