2,4,5-Trihydroxyamphetamine
2,4,5-Trihydroxyamphetamine (THA or THA-2), also known as α-methyl-6-hydroxydopamine (α-Me-6-OHDA) or as 2,4,5-TDM-TMA-2, is a neurotoxin and a metabolite of MDMA related to 6-hydroxydopamine. It comes from the ring hydroxylation of 3,4-methylenedioxyamphetamine (MDA).
Source: Wikipedia — 2,4,5-Trihydroxyamphetamine (CC BY-SA 4.0)