ER21355 hydrochloride is the hydrochloride form of ER21355 (HY-101826). ER21355 hydrochloride is an inhibitor for phosphodiesterase (PDE), which is potent for ameliorating benign prostatic hyperplasia (BPH) and prostatism through increasing levels of cAMP and cGMP, and resulting a relaxation of the smooth muscle cell[1].
