H-89 Dihydrochloride. A protein kinase A (PKA) inhibitor, Synonyms: N-[2-[[3-(4-Bromophenyl)-2-propen-1-yl]amino]ethyl]-5-Isoquinolinesulfonamide dihydrochloride, Purity: G98% by High-performance liquid chromatography, CAS Number: 127243-85-0, Molecular Formula: C2GH2GBrNGO2S.2HCl, 5mg.