You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[4-(3a-methyl-1,5-dioxo-2,3-dihydropyrrolo[1,2-a]quinazolin-4-yl)butanoylamino]-4-chloro-N-propan-2-ylbenzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H29ClN4O4
assistant