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 [2-(3-methylbutan-2-yl)-5,6,7,8-tetrahydroimidazo[1,2-a]pyridin-3-yl]methanesulfonyl chloride ?
user
C13H21ClN2O2S
assistant