You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-[(2S)-2-(3,4-dichlorophenyl)-5-(2-oxospiro[1H-2-benzothiophene-3,4'-piperidine]-1'-yl)-1-[(3,4,5-trimethoxyphenyl)methoxy]pentan-2-yl]-3-[(4-fluorophenyl)methyl]-1-methylurea by IUPAC nomenclature, provide its molecular formula.
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C42H48Cl2FN3O6S
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