You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 2-chloro-1-[2-(6,8-dihydro-5H-imidazo[1,2-a]pyrazin-7-yl)-1,3-thiazol-4-yl]ethanone using the IUPAC nomenclature.
user
C11H11ClN4OS
assistant