centalun centalun centalun was developed by boehringer ingelheim in 1962 and is a psycholeptic drug with hypnotic and sedative effects, via allosteric agonism of the gabaa receptor. it was previously used for sedation in medical procedures such as surgery, orthopedics and gynecology, although it is no longer in clinical use. despite its history of clinical use, centalun was never incorporated into the csa and therefore remains unregulated as a drug of abuse. centalunclinical dataatc codenonelegal statuslegal status in general: unscheduled identifiers iupac name 2-methyl-1-phenylbut-3-yne-1,2-diol cas number2033-94-5 ypubchem cid16252chemspider15421 nunii3n20vgj39ycomptox dashboard (epa)dtxsid50942486 chemical and physical dataformulac11h12o2molar mass176.215 g·mol−13d model (jsmol)interactive image smiles oc(c1ccccc1)c(c#c)(o)c inchi inchi=1s/c11h12o2/c1-3-11(2,13)10(12)9-7-5-4-6-8-9/h1,4-8,10,12-13h,2h3 nkey:gqoxdwhrxdpzjk-uhfffaoysa-n n ny (what is this?) (verify)