You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 5-[[4-(diethylamino)-2-methoxyphenyl]methylidene]-4-hydroxy-2-(4-methoxyphenyl)iminothiophene-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H30N2O5S
assistant