ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%26%2361%3B1S/C18H12/c1-3-7-15-13%285-1%299-11-18-16-8-4-2-6-14%2816%2910-12-17%2815%2918/h1-12H/file?format=sdf&get3d=True  -- InChI%3DInChI%26%2361%3B1S/C18H12/c1-3-7-15-13%285-1%299-11-18-16-8-4-2-6-14%2816%2910-12-17%2815%2918/h1-12H could not be loaded.