You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-[(2S,4aS,8aR)-2-methyl-3,4,4a,5,6,7,8,8a-octahydro-2H-quinolin-1-yl]propyl]-2-hydroxy-5-methylbenzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H32N2O2
assistant