delta-7-tetrahydrocannabinol delta-7-tetrahydrocannabinol delta-7-tetrahydrocannabinol (alternatively numbered as delta-5-tetrahydrocannabinol, δ5-thc, δ7-thc) is a synthetic isomer of tetrahydrocannabinol. the (6ar,9s,10ar)-δ7-thc epimer is only slightly less potent than δ9-thc itself, while the (9r) enantiomer is much less potent. delta-7-tetrahydrocannabinolidentifiers iupac name (6ar,9s,10ar)-6,6,9-trimethyl-3-pentyl-6a,9,10,10a-tetrahydrobenzochromen-1-ol cas number162678-94-6 ypubchem cid10313569chemspider8489034uniissa668roqjchemical and physical dataformulac21h30o2molar mass314.469 g·mol−13d model (jsmol)interactive image smiles cccccc1=cc(=c23c(c=c3c(oc2=c1)(c)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/h9-10,12-14,16-17,22h,5-8,11h2,1-4h3/t14-,16-,17-/m1/s1key:wwymygivlcktbl-djimgwmzsa-n