You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2R)-N-(4-chloro-2-methoxy-5-methylphenyl)-2-[(5-phenyl-1,3,4-oxadiazol-2-yl)sulfanyl]propanamide into its molecular formula.
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C19H18ClN3O3S
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