Selective and competitive urotensin-II (UT) receptor antagonist (pKB = 8.3). Blocks hU-II induced contractions in thoracic aorta ex vivo. Exhibits no effect on noradrenaline or endothelin 1-induced contraction or on acetylcholine-induced relaxation. Behav
Cyclobuxine D is a steroidal alkaloid extracted from Buxus microphylla. Cyclostatin D has obvious bradycardia effect on rat heart, and inhibits acetylcholine and Ba ++ induced longitudinal muscle contraction isolated from rabbit jejunum.
Acetylcholine perchlorate is the perchlorate salt of acetylcholine. Acetylcholine, an endogenous neurotransmitter at cholinergic synapses, could amplify the action potential of the sarcolemma following by inducing muscle contractions.