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PI3Kγ inhibitor 1 is a PI3Kδ and PI3Kγ inhibitor extracted from patent WO2014004470A1, Compound 168 in Table 4, has IC50s of <100 nM. PI3Kδ|100 nM (IC50)|PI3Kγ|100 nM (IC50)|PI3Kα|10 μM (IC50)|PI3Kβ|10 μM (IC50)

In Table 3, PI3Kγ inhibitor 1 (Compound 168) inhibits PI3Kδ, PI3Kγ, PI3Kα and PI3Kβ with IC50s of <100 nM, <100 nM, <10 μM and <10 μM, respectively. PI3Kγ inhibitor 1 inhibits B cell proliferation with an EC50<100 nM.

[1]. Vito J. Palombella, et al. Treatment of lupus, fibrotic conditions, and inflammatory myopathies and other disorders using pi3 kinase inhibitors. WO 2014004470 A1.

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