You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-chloro-N-methyl-N-(5,6,7,8-tetrahydroimidazo[1,2-a]pyridin-2-ylmethyl)imidazo[1,2-a]pyridine-3-sulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H18ClN5O2S
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