In 2006, it was discovered that H4CBD has a binding affinity of 145nM at the CB1 receptor and potential anti-inflammatory effects independent of its cannabinoid receptor action. In contrast, CBD has been found to bind to the CB1 receptor as an inverse agonist/antagonist with a Ki ranging from 3.3 to 4.8 mM.
Elucidation
In 2023 H4CBD epimers were elucidated using NOESY and COSYNMR spectroscopic techniques, while the inclusion of LC-MS and SCFC were used to isolate individual diasteromers.
↑Jacob, A.; Todd, A. R. (1940). "119. Cannabis indica. Part II. Isolation of cannabidiol from Egyptian hashish. Observations on the structure of cannabinol". J. Chem. Soc. 119: 649–653. doi:10.1039/jr9400000649.