You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-hydroxy-1-(3-morpholin-4-ylpropyl)-3-[(4-nitrophenyl)methyl]pyrimido[1,2-a]benzimidazol-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H25N5O5
assistant