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 (T23379),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).