You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (2R)-2-(4-methyl-1,3-thiazol-2-yl)-3,6-dioxo-6-(5,6,7,8-tetrahydronaphthalen-2-yl)hexanenitrile .
user
C20H20N2O2S
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