L-Dihydroorotic acid also known as (S)-45-dihydroorotate or dihydro-L-orotate belongs to the class of organic compounds known as alpha amino acids and derivatives.

Propanidid (Sombrevin) is a gamma-aminobutyric acid type A receptor (GABAA) agonist and a fast-acting intravenous anesthetic that lowers arterial blood pressure.

BQ-3020 (TFA) is a selective ETB receptor agonist that inhibits [125I] et-1 binding to the ETB receptor in the cerebellum with a 0.2nm IC50, causing vasoconstriction.