RP-001 hydrochloride is a selective agonist of picomolar short-acting S1P1 (EDG1)(EC50 of 9 pM), has little activity on S1P2-S1P4 and only moderate affinity for S1P5.
Umbralisib hydrochloride is a novel PI3Kδ inhibitor (IC50 and EC50 of 22.2 nM and 24.3 nM, respectively). Umbralisib hydrochloride is also active against CK1ε (EC50: 6.0 μM).