Δ3-Tetrahydrocannabinol
Δ3-Tetrahydrocannabinol (often abbreviated as delta-3-THC or Δ3-THC) is a synthetic isomer of tetrahydrocannabinol (THC) developed during the original research in the 1940s to develop synthetic routes to the natural products Δ8-THC and Δ9-THC found in the cannabis. While the normal trans configuration of THC is in this case flattened by the double bond, it still has two enantiomers as the 9-methyl group can exist in an (R) or (S) conformation.