Mirodenafil (SK3530) dihydrochloride is an orally active, potent, reversible, and selective phosphodiesterase 5 ( PDE5 ) inhibitor. Mirodenafil dihydrochloride is a glucocorticoid receptor (GR) modulator Mirodenafil dihydrochloride activates the Wnt/β-catenin signaling pathway by downregulating Dkk1 expression. Mirodenafil dihydrochloride can be used for the research of erectile dysfunction (ED), Alzheimer’s disease (AD) and systemic sclerosis (SSc).