Type I BMP receptor inhibitor (Ki values are <1, 5.4 and 43 nM for ALK6, ALK3 and ALK2, respectively). Exhibits >30-fold selectivity over ALK4, ALK5, BMPR2, AMPK and VEGFR2. Also binds to TGFBR2 (Ki = 85 nM). Decreases growth and induces cell death of H1299 non-small cell lung carcinoma cells in vitro. Enhances liver regeneration in vivo. Purity 98%. MW (observed): 451.52