Gentisic acid ethanolamide is a complexing agent in pharmaceutical parenterals. It is used as a solubilizer in some pharmaceutical preparations and as an antiseptic agent.

NAG-thiazoline (NGT) and its derivatives are well-known inhibitors against most b-acetylglucosaminidases (b-GlcNAcases) except for insect and bacterial chitinolytic b-GlcNAcase. Among them, NGT was the only one specifically designed to be an analog of the oxazolinium reaction intermediate based on the substrate-assisted mechanism, an attractive starting point to develop potent inhibitors. It is a major building block for the synthesis of potential inhibitors of transglycosylases involved in bacterial cell wall biosynthesis.

Creatine is an amino acid that occurs in vertebrate tissues and in urine. It is synthesized mainly in the liver from three different amino acids: arginine, glycine, and methionine. In skeletal muscles, which store 95% of it, creatine generally occurs as phosphocreatine. The rest is stored in the brain, heart, and testes. Creatine functions as part of the cell's energy shuttle. It is excreted as creatinine in the urine.

Medronic acid (conjugate base, medronate) is a diagnostic agent that is used in complex with technetium Tc-99m for imaging delineate areas of altered osteogenesis. Upon administration the complex binds to hydroxyapatite crystals in bone.