乙酸酐

(4Z)-2-methyl-4((pyridin-3-yl)methylene)oxazol-5(4H)-one

5-[3]pyridylmethylene-imidazolidine-2,4-dione

2-(benzoylamino)-3-(3-pyridinyl)-propanoic acid

(4Z)-2-phenyl-4-(pyridin-3-ylmethylidene)-1,3-oxazol-5-one