ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C18H12/c1-2-8-14-13%287-1%2915-9-3-4-11-17%2815%2918-12-6-5-10-16%2814%2918/h1-12H/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C18H12/c1-2-8-14-13%287-1%2915-9-3-4-11-17%2815%2918-12-6-5-10-16%2814%2918/h1-12H could not be loaded.