Интересно, Вики пишет именно про аденозин, без фосфорных групп вообще:
In general, adenosine has an inhibitory effect in the central nervous system (CNS). Caffeine's stimulatory effects are credited primarily (although not entirely) to its capacity to block adenosine receptors, thereby reducing the inhibitory tonus of adenosine in the CNS.
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Date: 2017-10-14 11:58 pm (UTC)In general, adenosine has an inhibitory effect in the central nervous system (CNS). Caffeine's stimulatory effects are credited primarily (although not entirely) to its capacity to block adenosine receptors, thereby reducing the inhibitory tonus of adenosine in the CNS.
https://en.wikipedia.org/wiki/Adenosine