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 ethyl 9-[5-[(6-chloro-4-methyl-1H-benzimidazol-2-yl)sulfanyl]furan-2-yl]-8-oxo-2,5,6,7,8a,9-hexahydropyrrolo[3,4-b]quinoline-3-carboxylate ?
user
C26H23ClN4O4S
assistant