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-chloro-N-[2-[3-(4-chlorophenyl)-5,7-dihydro-4H-[1,2]oxazolo[3,4-c]pyridin-6-yl]-2-oxoethyl]benzamide ?
user
C21H17Cl2N3O3
assistant