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