3-hydroxypiperidin-2-one
L-(-)-α-hydroxy-δ-carbobenzoxyaminovaleric acid
(E)-5-[[bis[[(1,1-dimethoxy)carbonyl]amino]methylene]amino]-2-oxopentanoyl-N-[2-(4-acetoxyphenyl)ethenyl]glycinamide
(E)-5-[[bis[[(1,1-dimethoxy)carbonyl]amino]methylene]amino]-2-hydroxypentanoyl-N-[2-(4-acetoxyphenyl)ethenyl]glycinamide