tdiq tdiq tdiq (also known as 6,7-methylenedioxy-1,2,3,4-tetrahydroisoquinoline or mdthiq) is a drug used in scientific research, which has anxiolytic and anorectic effects in animals. it has an unusual effects profile in animals, with the effects generalising to cocaine and partially to mdma and ephedrine, but the effects did not generalise to amphetamine and tdiq does not have any stimulant effects. it is thought these effects are mediated via a partial agonist action at alpha-2 adrenergic receptors, and tdiq has been suggested as a possible drug for the treatment of cocaine dependence. tdiqidentifiers iupac name 5,6,7,8-tetrahydro-dioxoloisoquinoline cas number15052-05-8 ypubchem cid27013chemspider25154uniin2ne2tm9zfcomptox dashboard (epa)dtxsid00933985 chemical and physical dataformulac10h11no2molar mass177.199 g·mol−13d model (jsmol)interactive image smiles c23ococ2cc1ccncc1c3 inchi inchi=1s/c10h11no2/c1-2-11-5-8-4-10-9(3-7(1)8)12-6-13-10/h3-4,11h,1-2,5-6h2key:jhldjobiuvjstg-uhfffaoysa-n (verify)