Selumetinib (AZD6244)是一种有效，高选择性的MEK1抑制剂，IC50为14 nM，也抑制ERK1/2磷酸化，IC50为10 nM，对p38α， MKK6， EGFR， ErbB2， ERK2， B-Raf等没有抑制作用。Phase 3。A MEK-1 non-ATP competitive inhibitor. Selumetinib (AZD6244) is a potent, highly selective MEK1 inhibitor with IC50 of 14 nM, also inhibits ERK1/2 phosphorylation with IC50 of 10 nM, no inhibition to p38α, MKK6, EGFR, ErbB2, ERK2, B-Raf, etc. Phase 3. A MEK-1 non-ATP competitive inhibitor.