diethyl 2-[4-(2-ethoxy-2-oxoethyl)-4-hydroxy-3-phenyl-1,3-thiazolidin-2-ylidene]propanedioate

ethyl 3-(3-amino-5-anilino-4-carbamoylthiophen-2-yl)-3-oxopropanoate

ethyl 3-(3-amino-5-anilino-4-cyanothiophen-2-yl)-3-oxopropanoate

ethyl 2-dicyanomethylene-4-hydroxy-3-phenylthiazolidine-4-acetate

ethyl 2-(3-phenyl-2-sulfanylidene-1,3-thiazol-4-yl)acetate