ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C20H12/c1-5-13-6-2-11-17-18-12-4-8-14-7-3-10-16%2820%2814%2918%2915%289-1%2919%2813%2917/h1-12H/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C20H12/c1-5-13-6-2-11-17-18-12-4-8-14-7-3-10-16%2820%2814%2918%2915%289-1%2919%2813%2917/h1-12H could not be loaded.