You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1a-ethyl-6-[imidazol-1-yl(phenyl)methyl]-3,7b-dihydro-1H-cyclopropa[c]quinolin-2-one;molecular hydrogen is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H23N3O
assistant