Bencycloquidium Bromide is a muscarinic M3 antagonist. Bencycloquidium bromide inhibits nasal hypersecretion in a rat model of allergic rhinitis. Bencycloquidium Bromide showed high affinity toward the M(3) receptor in Chinese hamster ovary (CHO) cells (M(1) pKi=7.86, M(2) pKi=7.21, M(3) pKi=8.21); pA(2)=8.85, 8.71 and 8.57 in methacholine-induced contraction of trachea, ileum and urinary bladder, 8.19 in methacholine-induced bradycardia of right atrium in vitro, respectively.This compound is unstable in powder form and other related salt forms are recommened.
Solifenacin D5 hydrochloride is a deuterium-labeled Solifenacin hydrochloride, which acts as an antagonist of muscarinic receptors with pKis of 7.6, 6.9, and 8.0 for M1, M2, and M3 receptors, respectively.
Terodiline hydrochloride is an antagonist of M1-selective muscarinic receptor (mAChR)(Kbs of 15, 160, 280, and 198 nM in rabbit vas deferens (M1), atria (M2), bladder (M3) and ileal muscle (M3), respectively).