You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named tert-butyl 2-[5-amino-4-[(E)-2-amino-1-chloro-2-phenylethenyl]-1-[2-(4-methylpiperazin-1-yl)ethyl]pyrazol-3-yl]indole-1-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C31H38ClN7O2
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