Hydrogen Tartrate

It is a solid having MF C4H6O6H3N.

Rivastigmine (sold under the trade name exelon) is a parasympathomimetic or cholinergic agent for the treatment of mild to moderate dementia of the alzheimer’s type and dementia due to parkinson's disease.

Monosodium tartrate or sodium bitartrate is a sodium salt of tartaric acid. As a food additive it is used as an acidity regulator and is known by the E number E335.

Potassium bitartrate, also known as potassium hydrogen tartrate, has formula KC4H5O6. It is a byproduct of winemaking. In cooking it is known as cream of tartar. It is the potassium acid salt of tartaric acid, a carboxylic acid.