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 5-[2-[7-chloro-3-(2-methylpropyl)-4-oxoquinazolin-2-yl]sulfanylacetyl]-2,4-dimethyl-1H-pyrrole-3-carboxylate ?
user
C23H26ClN3O4S
assistant