You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (6R,6aR,11bS)-6-(3,4-dimethoxyphenyl)-6,6a,7,11b-tetrahydro-5H-indeno[2,1-c]quinoline-4-carboxylic acid .
user
C25H23NO4
assistant