If you have any more information or context about SONE-026, I'd be happy to help refine this article or provide a more targeted exploration. The world of codes, keywords, and cryptic references is vast and intriguing, and I'm here to help navigate it.
The lead optimization campaign (2019‑2021) focused on achieving for PI3Kδ/γ over PI3Kα/β while maintaining oral bioavailability. Substituent scanning at the 6‑position of the quinazoline core identified the 4‑pyridyl moiety as a critical determinant of PI3Kγ affinity (IC₅₀ = 1.2 nM). Introduction of a fluorine atom at the para‑position of the phenyl ring reduced CYP3A4 metabolism, resulting in a ~ 2‑fold increase in in‑vivo exposure in rodents. SONE-026