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 [4-[8-chloro-3-(methoxymethyl)-[1,2,4]triazolo[4,3-c]quinazolin-5-yl]piperazin-1-yl]-(furan-2-yl)methanone ?
user
C20H19ClN6O3
assistant