You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1a-[3-oxo-3-(5-prop-1-en-2-ylimidazo[1,2-a]pyrimidin-7-yl)propyl]-4,5,7,7b-tetrahydro-1H-cyclopropa[h]quinolin-6-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H22N4O2
assistant