p-Phenylenediamine, N,N'-diphenyl- is a bioactive chemical. It has been used to prevent vitamin E deficiency in lambs.

Aminomalonic acid (Ama) was first detected in alkaline hydrolysates of proteins in 1984. Ama has been isolated from proteins of Escherichia coli and human atherosclerotic plaque. The presence of Ama has important biological implications because the malonic acid moiety potentially imparts calcium binding properties to protein.

acetone-[bis-(2-amino-ethyl)-dithioacetal].