You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3aS,3bS,9aR,9bR,11aR)-1-[(6-chloro-5,7-dimethyl-1H-imidazo[4,5-b]pyridin-2-yl)methyl]-6,9a,11a-trimethyl-2,3,3a,3b,4,5,5a,9b,10,11-decahydro-1H-indeno[5,4-f]quinolin-7-one by IUPAC nomenclature, provide its molecular formula.
user
C28H37ClN4O
assistant