MA-2029 is a selective, orally active, and competitive motilin receptor antagonist (IC50=4.9 nM). MA-2029 is selective for the motilin receptor over various other receptors and ion channels. MA-2029 may be useful for gastrointestinal disorders associated with disturbed gastrointestinal motility.

ANQ-11125 is a potent and selective antagonist of motilin, with the pKd of 8.24. ANQ-11125 blocks motilide-induced contractions in vitro in the rabbit.

ANQ-11125 TFA is a potent and selective antagonist of motilin, with the pKd of 8.24. ANQ-11125 TFA blocks motilide-induced contractions in vitro in the rabbit.

A potent, selective, small molecule motilin receptor agonist with pEC50 of 7.9 (hMTL-R); displays selectivity over closely related human ghrelin acceptor (pEC50< 6.0) and no liabilities at the hERG channel; possesses highly excellent pharmacokinetic profiles in both rat and dog.

A potent, selective, small molecule motilin receptor agonist with pEC50 of 7.9 (hMTL-R); displays selectivity over closely related human ghrelin acceptor (pEC50< 6.0) and no liabilities at the hERG channel; possesses highly excellent pharmacokinetic profiles in both rat and dog.

DS-3801b is a potent and non-macrolide agonist of GPR38. DS-3801b is expected to be novel gastrointestinal prokinetic agents for the research of functional gastrointestinal disorders such as gastroparesis and chronic constipation.