>>They have now found a compound called anandamide to have agonist action,
>>but I don't believe anandamide is endogeneous, so the mystery remains...
>Restak covers this in his new book entitled "Receptors".
>He claims that there is an endogenous ligand for the THC receptor.
And anandamide is _it_. See the paper by R. Mechoulam in the July
1993 issue of _Journal of Neurochemistry_ (sorry; I don't have the
full citation). By the way, the word is derived from the Sanskrit for