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-[4-[(3R)-4-acetyl-3-methylpiperazin-1-yl]-6-chloropyrimidin-2-yl]sulfanyl-N-hexylacetamide ?
user
C19H30ClN5O2S
assistant