You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-(benzimidazol-1-yl)-1-[(3R)-3-(5-methyl-1,3-thiazol-2-yl)piperidin-1-yl]ethanone into molecular formula.
user
C18H20N4OS
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