(E)-4-Hydroxycrotonic acid

(E)-4-Hydroxycrotonic acid (T-HCA) is a high-affinity ligand for GHB binding sites, with a ki value of 1.1 μM. The introduction of diaryl substituents into (E)-4-Hydroxycrotonic acid significantly enhances its affinity for GHB binding sites, with ki values ranging from 0.023 to 0.075 μM. (E)-4-Hydroxycrotonic acid holds promise for optimizing GHB ligand structures and assisting in the development of effective three-dimensional pharmacophore models.