You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance N-[4-(2,4-dichlorophenyl)-1,3-thiazol-2-yl]-5-methyl-N-[[(2R)-oxolan-2-yl]methyl]pyrazine-2-carboxamide .
user
C20H18Cl2N4O2S
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