You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-(3a-methyl-1,5-dioxo-2,3-dihydropyrrolo[1,2-a]quinazolin-4-yl)-N-[2-(4-bromopyrazol-1-yl)phenyl]acetamide .
user
C23H20BrN5O3
assistant