You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(2,3-dihydro-1,4-benzodioxin-6-yl)-2-methyl-N-phenyl-1,4-dihydropyrimido[1,2-a]benzimidazole-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H22N4O3
assistant