6B8Y:
reference: Heterobicyclic inhibitors of transforming growth factor beta receptor I (TGFbetaRI)., Harikrishnan LS, Warrier J, Tebben AJ, Tonukunuru G, Madduri SR, Baligar V, Mannoori R, Seshadri B, Rahaman H, Arunachalam PN, Dikundwar AG, Fink BE, Fargnoli J, Fereshteh M, Fan Y, Lippy J, Ho CP, Wautlet B, Sheriff S, Ruzanov M, Borzilleri RM, Bioorg Med Chem. 2018 Mar 1;26(5):1026-1034. doi: 10.1016/j.bmc.2018.01.014. Epub, 2018 Jan 31. PMID: 29422332

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).