You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl (2E,5S)-7-methyl-2-[[4-(2-methylpropoxy)phenyl]methylidene]-3-oxo-5-thiophen-2-yl-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H26N2O4S2
assistant