delta-11-tetrahydrocannabinol delta-11-tetrahydrocannabinol delta-11-tetrahydrocannabinol (delta-11-thc, δ11-thc, δ9(11)-thc, exo-tetrahydrocannabinol) is a synthetic isomer of tetrahydrocannabinol, developed in the 1970s. it can be synthesised from δ8-thc by several different routes, though only the (6ar, 10ar) enantiomer is known. in animal studies it was found to be active in mice with around 1/4 the potency of δ9-thc, but did not substitute for thc in rhesus monkeys, probably because the dose tested was not high enough to produce cannabinoid-like effects. it has been identified as a component of "vaping liquids" sold for use in humans. delta-11-tetrahydrocannabinolidentifiers iupac name (6ar,10ar)-6,6-dimethyl-9-methylidene-3-pentyl-7,8,10,10a-tetrahydro-6ah-benzochromen-1-ol cas number16849-44-8 27179-28-8pubchem cid167577chemical and physical dataformulac21h30o2molar mass314.469 g·mol−13d model (jsmol)interactive image smiles cccccc1=cc(=c23cc(=c)cc3c(oc2=c1)(c)c)o inchi inchi=1s/c21h30o2/c1-5-6-7-8-15-12-18(22)20-16-11-14(2)9-10-17(16)21(3,4)23-19(20)13-15/h12-13,16-17,22h,2,5-11h2,1,3-4h3/t16-,17-/m1/s1key:aoyyfuguuirbml-iagownofsa-n