You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
butyl (4S)-4-(3-hydroxyphenyl)-2,7,7-trimethyl-5-oxo-3,4,6,8-tetrahydroquinoline-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H29NO4
assistant