You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [4-(3,5-dichlorophenyl)sulfanyl-5-[2-methyl-1-(6-oxo-1H-pyridin-3-yl)propyl]-1H-imidazol-2-yl]methyl carbamate into its molecular formula.
user
C20H20Cl2N4O3S
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