AZSMO-23 is the human ether-a-go-go-related gene (hERG)-encoded potassium channel activator that acts by blocking hKv4.3-hKChIP2.2, hCav3.2, and hKv1.5 and activating hCav1.2/β2/α2δ.
Extremely potent KV1.3 channel blocker (Kd = 23 pM for mKV1.3 currents). Selective for KV1.3 over other mammalian potassium channels (IC50 values are 23, 1800, 10500, 37000 and 39000 pM for mKV1.3, mKV1.1, hKV1.6, mKV1.4 and rKV1.2 respectively, and >1000