You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-(2-methylpropanoyloxy)ethyl 9-(2-chloro-6-fluorophenyl)-7-methyl-1,1-dioxo-3,5,9,9a-tetrahydro-2H-[1,4]oxathiepino[6,5-b]pyridine-8-carboxylate .
user
C22H25ClFNO7S
assistant