PI3Kδ-IN-15 (compound 6b) is a selective PI3Kδ inhibitor with an IC50 of 0.5 nM for p110δ. PI3Kδ-IN-15 inhibits PI3Kδ with >30-fold higher potency than PI3Kγ, PI3Kβ, and PI3Kα[1].
References:
[1]. Yeon Su Kim, et al. Synthesis and biological evaluation of novel purinyl quinazolinone derivatives as PI3Kδ-specific inhibitors for the treatment of hematologic malignancies. Bioorg Med Chem. 2021 Sep 1;45:116312.