ethyl (2Z)-5-(1,3-benzodioxol-5-yl)-2-{[3-bromo-5-methoxy-4-(prop-2-en-1-yloxy)phenyl]methylidene}-7-methyl-3-oxo-2,3-dihydro-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate