You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule ethyl 2-[[2-(4-aminophenyl)sulfanyl-2-phenylacetyl]amino]-4-(4-methylphenyl)thiophene-3-carboxylate into molecular formula.
user
C28H26N2O3S2
assistant