You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[6-[1-(cyanomethyl)piperidin-3-yl]pyridin-2-yl]amino]-N-(oxan-4-yl)-1,3-thiazole-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H26N6O2S
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