Pilaralisib (XL147)是一种选择性的可逆I型PI3K抑制剂,作用于PI3Kα/δ/γ,在无细胞试验中IC50为 39 nM/36 nM/23 nM,对PI3Kβ作用较低。;Pilaralisib (XL147) is a selective and reversible class I PI3K inhibitor for PI3Kα/δ/γ with IC50 of 39 nM/36 nM/23 nM in cell-free assays, less potent to PI3Kβ.