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UH-AH 37 is a human muscarinic acetylcholine receptor antagonist.

UH-AH 37 is a muscarinic (mAChR) antagonist. UH-AH 37 exhibits a higher potency in inhibiting muscarinic responses in intestinal tissue than cardiac tissue[1].

[1] H N Doods, et al. UH-AH 37, an ileal-selective muscarinic antagonist that does not discriminate between M2 and M3 binding sites. Eur J Pharmacol. 1989 Feb 28;161(2-3):215-8. DOI:10.1016/0014-2999(89)90846-7