Selective ATP competitive sphingosine kinase 2 and 1 (SphK2/1) inhibitor (Ki values are 6.9 and 27 μM, respectively). Exhibits selectivity for SphK 1 and 2 over other kinases. Inhibits cellular S1P production and increases sphingosine and ceramide levels in vitro. Also induces mitochondrial-associated apoptosis. Reduces tumor growth in a human lung adenocarcinoma xenograft mouse model, by inducing apoptosis and suppressing angiogenesis. Cell permeable. MW (observed): 519.64.