ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%26%2361%3B1S/C18H12/c1-2-7-15-12-18-16%2811-14%2815%296-1%2910-9-13-5-3-4-8-17%2813%2918/h1-12H/file?format=sdf&get3d=True  -- InChI%3DInChI%26%2361%3B1S/C18H12/c1-2-7-15-12-18-16%2811-14%2815%296-1%2910-9-13-5-3-4-8-17%2813%2918/h1-12H could not be loaded.