You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (5E)-5-[[2-(4-chlorophenyl)sulfanylphenyl]methylidene]-3-[2-(3,4-dihydro-1H-isoquinolin-2-yl)-2-oxoethyl]-1,3-thiazolidine-2,4-dione by IUPAC nomenclature, provide its molecular formula.
user
C27H21ClN2O3S2
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