Idelalisib D5 is a deuterium labeled Idelalisib. Idelalisib is a highly selective and orally bioavailable p110δ inhibitor[1].
References
[1]. Lannutti BJ, et al. CAL-101, a p110delta selective phosphatidylinositol-3-kinase inhibitor for the treatment of B-cell malignancies, inhibits PI3K signaling and cellular viability. Blood, 2011, 117(2), 591-594.