You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 5-methylsulfanyl-4-[2-(3,4,5-trimethoxyanilino)-1,3-thiazol-4-yl]thiophene-2-carboxylate;hydrobromide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H21BrN2O5S3
assistant