4-[3-[[2-(4-Hydroxyphenyl)ethyl]amino]butyl]phenol-d6 Hydrochloride Salt;

Labeled Dehydroxy Ractopamine. Monoclonal antibody hybridoma immunoassay Ractopamine. Ractopamine is a veterinary drug, now considered illegal. A beta-adrenoceptor agonist, binding to muscle cell membrane receptors, resulting in increased protein synthesis and increased muscle fibers.