You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (E)-2-cyano-3-[5-[5-[7-[4-(4-methyl-N-(4-methylphenyl)anilino)phenyl]-9-oxofluoren-2-yl]thiophen-2-yl]thiophen-2-yl]prop-2-enoic acid into molecular formula.
user
C45H30N2O3S2
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