You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named ethyl 4-cyano-3-methyl-5-[(3-methyl-2-phenylquinoline-4-carbonyl)amino]thiophene-2-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C26H21N3O3S
assistant