Assertion: adenosine | /r/CapableOf | share common xanthine moiety
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Source sentences:
text: Adenosine and caffeine share a common xanthine moiety that in both cases establishes van der Waals interactions with M1775.38, M2707.35 and I2747.39, and a π-stacking interaction with the aromatic ring of F168, which is part of the helical portion of extracellular loop 2 (ECL2; Figures 3, 4) (Doré et al., 2011; Lebon et al., 2011b; Cheng et al., 2017).