Aren't adenosine receptors also part of the same pathways that opiates bond to?
That might explain the addictive nature of caffeine.
Stephen Beecroft wrote:
> >> (FWIW, I've been unable to find out why there is apparently no
> >> such compound as 1,7-trimethylxanthine.
> > Oops. I meant 1,7-dimethylxanthine . . .
> Also called "paraxanthine"; described as an adenosine receptor ligand
> and a major metabolite of caffeine at
Marc A. Schindler
Spruce Grove, Alberta, Canada -- Gateway to the Boreal Parkland
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