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 4-(4-chloro-6-methylquinolin-2-yl)-7-methoxy-3,5-dihydro-2H-1lambda6,4-benzothiazepine 1,1-dioxide .
user
C20H19ClN2O3S
assistant