Devapamil (D 888; Desmethoxyverapamil) is an antagonist for calcium channel[1].
Definition
ChEBI: A nitrile that acts as an L-type calcium channel blocker.
References
[1] Erdmann R, et al., The effect of the phenylalkylamine D888 (devapamil) on force and Ca2+ current in isolated frog skeletal muscle fibres. J Physiol. 1989 Jun;413:521-41. DOI:10.1113/jphysiol.1989.sp017667