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 4-[[2-[(E)-2-cyano-3-[(3-cyano-4,5,6,7-tetrahydro-1-benzothiophen-2-yl)amino]-3-oxoprop-1-enyl]phenoxy]methyl]benzoic acid ?
user
C27H21N3O4S
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