ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C20H16/c1-13-16-8-5-6-9-17%2816%2914%282%2920-18%2813%2912-11-15-7-3-4-10-19%2815%2920/h3-12H%2C1-2H3/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C20H16/c1-13-16-8-5-6-9-17%2816%2914%282%2920-18%2813%2912-11-15-7-3-4-10-19%2815%2920/h3-12H%2C1-2H3 could not be loaded.