Wikipedia
Bevenopran
Bevenopran ( INN, USAN) (former developmental code names CB-5945, ADL-5945, MK-2402, OpRA III) is a peripherally selective μ- and δ-opioid receptor antagonist that was under development by Cubist Pharmaceuticals for the treatment of chronic opioid-induced constipation. It reached phase III clinical trials for this indication before being discontinued.