You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[6-chloro-2-[(2R)-1-hydroxypropan-2-yl]-1-oxoisoquinolin-5-yl]-2-(3,4-dichlorophenyl)acetamide into its molecular formula.
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C20H17Cl3N2O3
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