ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C20H34O2/c21-20(22)18-12-10-8-6-4-2-1-3-5-7-9-11-15-19-16-13-14-17-19/h1-2,13,16,19H,3-12,14-15,17-18H2,(H,21,22)/b2-1 /file?format=sdf&get3d=True  -- InChI=1S/C20H34O2/c21-20(22)18-12-10-8-6-4-2-1-3-5-7-9-11-15-19-16-13-14-17-19/h1-2,13,16,19H,3-12,14-15,17-18H2,(H,21,22)/b2-1  could not be loaded.