You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3R,4R)-4-[4-(3-chlorophenyl)piperazine-1-carbonyl]-6,7-dimethoxy-2-methyl-3-(4-methylsulfanylphenyl)-3,4-dihydroisoquinolin-1-one by IUPAC nomenclature, provide its molecular formula.
user
C30H32ClN3O4S
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