You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by propyl (4S,7R)-4-(3-ethoxy-4-hydroxyphenyl)-2-methyl-5-oxo-7-phenyl-4,6,7,8-tetrahydro-3H-quinoline-3-carboxylate ?
user
C28H31NO5
assistant