You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by [2-(5-chlorothiophen-2-yl)-2-oxoethyl] (E)-3-[4-(azepan-1-ylsulfonyl)phenyl]prop-2-enoate ?
user
C21H22ClNO5S2
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