You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (3aS)-4-ethyl-N-methyl-N-[(4-methylsulfanylphenyl)methyl]-1,5-dioxo-2,3-dihydropyrrolo[1,2-a]quinazoline-3a-carboxamide ?
user
C23H25N3O3S
assistant