You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 3-chloro-2-methyl-N-[5-(pyridin-3-ylmethoxy)imidazo[1,2-a]pyrazin-6-yl]benzenesulfonamide ?
user
C19H16ClN5O3S
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