(R)-(4′-Hydroxy)-5,7-dihydroxy-4-chromanone, an antiangiogenic homoisoflavonoid, exhibits activity against human retinal microvascular endothelial cells.

SMA-12b is an analog of the immunomodulatory parasite product ES-62 that has immunomodulatory activity, can modify the expression of many inflammatory response genes.

3-methylthiopropionate is one of the metabolites of methionine (especially of D-methionine). Cultures of Streptomyces lincolnensis accumulated 3-methylthioacrylic acid in amounts directly related to the concentration of methionine in the medium. The first intermediate in the pathway may be the keto acid which is then oxidatively decarboxylated to 3-methylthiopropionic acid.