You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-ethyl-6,8-dimethoxy-5-methyl-1'-(2H-pyrido[1,2-a]pyrimidine-3-carbonyl)spiro[5,10-dihydroimidazo[1,5-b][2]benzazepine-3,4'-piperidine]-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C30H35N5O4
assistant