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 propyl (4R)-4-(1,3-benzodioxol-5-yl)-2-methyl-5-oxo-4,6,7,8-tetrahydro-1H-quinoline-3-carboxylate ?
user
C21H23NO5
assistant