You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(6-chloropyrazolo[1,5-a]pyrimidin-2-yl)-(3-thiophen-3-yl-6,8-dihydro-5H-[1,2,4]triazolo[4,3-a]pyrazin-7-yl)methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H12ClN7OS
assistant