Zandelisib (ME-401) is a phosphatidylinositol 3-kinase (PI3K) inhibitor extracted from patent WO2019183226 A1, Compound Example 1. Zandelisib selectively inhibits p110δ with an IC50 of 3.5 nM. Zandelisib functions as an antineoplastic[2].IC50 & Target: IC50: 3.5 nM (p110δ)[2]In Vitro: Zandelisib inhibits PI3Ks with IC50s of 4, 976 nM, 605 nM, 817 nM and 3.5 nM for p110α, p110β, p110γ and p110δ, respectivey.