You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-methyl-4-phenylsulfanyl-N-(5,6,7,8-tetrahydronaphthalen-1-yl)-1,2-oxazole-5-carboxamide into its molecular formula.
user
C21H20N2O2S
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