- Methylglyoxal bis(butylamidinohydrazone), a new inhibitor of polyamine biosynthesis that simultaneously inhibits ornithine decarboxylase, adenosylmethionine decarboxylase and spermidine synthase. Hibasami, H., Tsukada, T., Maekawa, S., Nakashima, K. Biochem. Pharmacol. (1986)