(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).

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.

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.

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

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.

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

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

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.

G-Protein antagonist peptide TFA is the substance P-related peptide that inhibits binding of G proteins to their receptors. G-Protein antagonist peptide TFA competitively and reversibly inhibits M2 muscarinic receptor activation of Gi or Go and inhibits Gs activation by β-adrenoceptors.

G-Protein antagonist peptide is the substance P-related peptide that inhibits binding of G proteins to their receptors. G-Protein antagonist peptide competitively and reversibly inhibits M2 muscarinic receptor activation of Gi or Go and inhibits Gs activation by β-adrenoceptors.

[D-Trp7,9,10]-Substance P TFA is the substance P analog that inhibits activation of Gq/11 by M1 muscarinic ACh receptors. [D-Trp7,9,10]-Substance P TFA does not inhibit Gi/o activation by M2 ACh receptors.

[D-Trp7,9,10]-Substance P is the substance P analog that inhibits activation of Gq/11 by M1 muscarinic ACh receptors. [D-Trp7,9,10]-Substance P does not inhibit Gi/o activation by M2 ACh receptors.

Anisodamine hydrobromide (6-Hydroxyhyoscyamine hydrobromide), a belladonna alkaloid, is a non-subtype-selective muscarinic and a nicotinic cholinoceptor antagonist. Anisodamine hydrobromide shows antioxidant, anti-inflammatory properties.

Telenzepine dihydrochloride is a selective and orally active muscarinic M1 receptor antagonist with a Ki of 0.94 nM. Telenzepine dihydrochloride inhibits gastric acid secretion and has antiulcer effects.

Clidinium-D5 bromide (Ro 2-3773-D5) is the deuterium labeled Clidinium bromide. Clidinium bromide is a quaternary amine antimuscarinic agent.

(R,R)-Glycopyrrolate ((R,R)-Glycopyrronium (bromide); (R,R)-Glycopyrrolate (bromide)) is an anticholinergic agent. (R,R)-Glycopyrrolate ((R,R)-Glycopyrronium (bromide); (R,R)-Glycopyrrolate (bromide)) has the ability to reduce the frequency of drooling in vivo with developmental disabilities.

Terodiline hydrochloride is an M1-selective muscarinic receptor (mAChR) antagonist with Kbs of 15, 160, 280, and 198 nM in rabbit vas deferens (M1), atria (M2), bladder (M3) and ileal muscle (M3), respectively. Terodiline hydrochloride also is a Ca2+ blocker. Terodiline hydrochloride acts as a treatment for urinary frequency and urge incontinence.

Solifenacin D5 hydrochloride is a deuterium labeled Solifenacin hydrochloride. Solifenacin hydrochloride is a muscarinic receptor antagonist with pKis of 7.6, 6.9 and 8.0 for M1, M2 and M3 receptors, respectively.

PCS1055 dihydrochloride is a potent, selective and competitive muscarinic M4 receptor antagonist with an IC50 of 18.1 nM and a Kd of 5.72 nM. PCS1055 dihydrochloride inhibits radioligand [3H]-NMS binding to the M4 receptor with a Ki of 6.5 nM. PCS1055 dihydrochloride exhibits >100-fold selectivity over M1-, M3-, and M5-receptors and 30-fold selectivity at the M2 receptor. PCS1055 dihydrochloride is also a potent AChE inhibitor with IC50 s of 22 nM and 120 nM for electric eel and human AChE, respectively.

PQCA is a highly selective and potent muscarinic M1 receptor positive allosteric modulator. PQCA has an EC50 value of 49 nM and 135 nM on rhesus and human M1 receptor, respectively, and is inactive for other muscarinic receptors. PQCA improves cognitive performance and cerebral blood flow in rat, cynomolgus macaque, and rhesus macaque. PQCA has potential to reduce the cognitive deficits associated with Alzheimer's disease.

Nebracetam hydrochloride, a nootropic M1-muscarinic agonist, induces a rise of intracellular Ca2+ concentration. Nebracetam hydrochloride exhibits an EC50 of 1.59 mM for elevating [Ca2+]i.

Otenzepad (AF-DX 116) is a selective and competitive M2 muscarinic acetylcholine receptor antagonist, with IC50 values of 640 nM and 386 nM for rabbit peripheral lung and rat heart, respectively.

Xanomeline(LY246708) is a selective M1 muscarinic receptor agonist.

VU6004256 (VU 6004256) is a highly potent, selective M1 muscarinic acetylcholine receptor (mAChR) positive allosteric modulator with EC50 of 155 nM (mouse M1), significant selectivity over M2-M5 (EC50>30 uM).

VU0467154 (VU 0467154) is a potent, selective M4 mAChR positive allosteric modulator with EC50 of 17.7 nM.

VU0453595 (VU453595) is a potent, selective M1 positive allosteric modulator (PAM) with EC50 of 3.2 uM (rM1).

Tolterodine L-Tartrate is a muscarinic receptor antagonist that is active at all mAChR M subtypes. This compound blocks the opening of ion channels by acetylcholine, which in turn leads to muscle relaxation by blocking neuronal signaling.

PF-06827443 (PF06827443) is a potent, orally bioavailable, and CNS-penetrant M1-selective positive allosteric modulator (PAM) with EC50 of 47 nM, shows no activity against M2-M5 at 10 uM.

PF-06764427 (PF06764427) is a potent, selective M1 muscarinic acetylcholine receptor (mAChR) positive allosteric modulator with EC50 of 55 nM, has no measurable agonist or PAM activity at the M2-M5 receptors at 10 uM.

AC260584 is an M1 muscarinic receptor allosteric agonist with a pEC50 of 7.6.