Ipratropium bromide (Atrovent, Sch 1000) monohydrate is an antagonist of muscarinic acetylcholine receptors (mAChR) with IC50 of 2.9 nM, 2.0 nM, and 1.7 nM for M1, M2, and M3 receptors, respectively.

JHU37160 is a potent and brain-penetrant DREADD agonist, with EC50s of 18.5 nM and 0.2 nM for hM3Dq and hM4Di DREADDs in HEK-293 cells, respectively. JHU37160 exhibits selective [3H]Clozapine displacement from DREADDs and not from other Clozapine-binding sites in mice brain tissue.

JHU37152 is a Designer Receptors Exclusively Activated by Designer Drug (DREADD) agonist with Ki of 1.8 nM and 8.7 nM for human muscarinic acetylcholine M3 receptors (hM3Dq) and hM4Di in vitro, respectively. And EC50 values are 5 nM and 0.5 nM for hM3Dq and hM4Di in fluorescent and BRET-based assays in HEK-293 cells, respectively.,hM4Di [1](Cell-free assay) hM3Dq [1](Cell-free assay) hM3Dq [1](Cell-free assay) hM4Di [1](Cell-free assay) 0.5 nM(EC50) 1.8 nM(Ki) 5 nM(EC50) 8.7 nM(Ki),JHU37152 is a potent DREADD agonist with high potency and efficacy in fluorescent and BRET-based assays in HEK-293 cells, whereas no responses are observed in untransfected HEK-293 cells.[1],JHU37152 exhibits high in vivo DREADD potency. JHU37152 exhibits selective [3H]clozapine displacement from DREADDs in brain tissue from WT and D1-DREADD mice.[1]

Sofpironium bromide (BBI 4000) is an anticholinergic agent used in the study of primary axillary hyperhidrosis (PAH). Sofpironium bromide reduces sweating by inhibiting M3 muscarinic receptors in eccrine glands at the application site. Sofpironium bromide also has a high afnity for the M1, M2, M4 and M5 subtypes.

Guvacoline hydrochloride, a pyridine alkaloid found in Areca triandra, can act as a weak full agonist of atrial and ileal muscarinic receptors.

VU6000918 is a muscarinic acetylcholine (M4) positive allosteric modulator, with an EC50 of 19 nM for hM4.

Xanomeline, as an effective and selective muscarinic type 1 and type 4 (M1/M4) receptor agonist, increases neuronal excitability. Xanomeline can be used for the research of neurological disorders, such as schizophrenia.

Dronedarone D6 hydrochloride is the deuterium labeled Dronedarone. Dronedarone hydrochloride, a derivative of Amiodarone, is a class III antiarrhythmic agent for the study of atrial fibrillation (AF) and atrial flutter. Dronedarone hydrochloride is a potent blocker of multiple ion currents, including potassium current, sodium current, and L-type calcium current, and exhibits antiadrenergic effects by noncompetitive binding to β-adrenergic receptors. Dronedarone hydrochloride is a substrate for and a moderate inhibitor of CYP3A4.

Muscarine ((+)-Muscarine) iodide is a toxin that can stimulate the parasympathetic nervous system. Muscarine iodide is a prototype muscarinic acetylcholine receptor agonist.

W-84 (dibromide) is a potent allosteric modulator of M2-cholinoceptors, which retards [3H]N-methylscopolamine dissociation. W-84 dibromide can stabilize cholinergic antagonist-receptor complexes. W-84 (dibromide) is a non-competitive muscarinic acetylcholine receptors antagonist with allosteric effects. W-84 (dibromide) protects over additively against an organophosphate-intoxication when applied in combination with atropine.

(S)-(+)-Dimethindene maleate, an enantiomer, is a potent M2-selective muscarinic receptor antagonist (pA2 = 7.86/7.74; pKi = 7.78). (S)-(+)-Dimethindene maleate shows lower affinities for the muscarinic M1 (pA2 = 6.83/6.36; pKi = 7.08), the M3 (pA2 = 6.92/6.96; pKi = 6.70) and the M4 receptors (pKi = 7.00), respectively. (S)-(+)-Dimethindene maleate also is a histamine H1 receptor antagonist (pA2 = 7.8).

Emraclidine is a muscarinic M4 receptor positive allosteric modulator (WO2018002760, compound 11). Emraclidine can be used for the research of neurological diseases.

Velufenacin is a muscarinic receptor antagonist.

Navafenterol (AZD-8871) saccharinate is an inhaled, long-acting bronchodilator, which is a muscarinic antagonist and β2 agonist.

PD 102807 is a M4 muscarinic receptor antagonist with an IC50 of 90.7 nM. PD 102807 inhibits M1, M2, M3, M5 muscarinic receptor with IC50s of 6558.7, 3440.7, 950.0, and 7411.7 nM, respectively. Antidyskinetic effect.

(Rac)-5-Hydroxymethyl Tolterodine ((Rac)-Desfesoterodine), an active metabolite of Tolterodine, is a mAChR antagonist (Ki values of 2.3 nM, 2 nM, 2.5 nM, 2.8 nM, and 2.9 nM for M1, M2, M3, M4, and M5 receptors, respectively). (Rac)-5-Hydroxymethyl Tolterodine can be used for overactive bladder research.

(Rac)-5-Hydroxymethyl Tolterodine ((Rac)-Desfesoterodine) hydrochloride, an active metabolite of Tolterodine, is a mAChR antagonist (Ki values of 2.3 nM, 2 nM, 2.5 nM, 2.8 nM, and 2.9 nM for M1, M2, M3, M4, and M5 receptors, respectively). (Rac)-5-Hydroxymethyl Tolterodine hydrochloride can be used for overactive bladder research.

Navafenterol (AZD-8871) is an inhaled dual-acting, potent, selective, and long-lasting M3-antagonist/β2-agonist (MABA) with long-lasting effects and favorable safety profile. The pIC50 is 9.5 for human M3 receptor, and the pEC50 is 9.5 for β2-adrenoceptor. Navafenterol can be used for the research of chronic obstructive pulmonary disease (COPD). Bronchoprotective and antisialagogue effects. Favorable cardiovascular profile.

MK-6884-11C is a positron emission tomography (PET) imaging agent for the study of M4 muscarinic receptor positive allosteric modulators (PAMs) in neurodegenerative diseases.

Milameline is a muscarinic receptor agonist that improves cognition.

Sabcomeline (hydrochloride) is a potent and functionally selective muscarinic M1 receptor partial agonist that improve cognition.

Aceclidine is a modulator of M3 muscarinic acetylcholine receptor. Aceclidine is a cycloplegic agent, a surfactant, a tonicity adjustor and optionally a viscosity enhancer and an antioxidant. Aceclidine has the potential for the research of disorders such as refractive errors of the eye, xerostomia, Sjogren's syndrome, glaucoma, conjunctivitis, lacrimal gland disease, and esotropia (extracted from patent US20150290125A1/US20110091459A1).