ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%26%2361%3B1S/C18H12/c1-2-6-14-10-18-12-16-8-4-3-7-15%2816%2911-17%2818%299-13%2814%295-1/h1-12H/file?format=sdf&get3d=True  -- InChI%3DInChI%26%2361%3B1S/C18H12/c1-2-6-14-10-18-12-16-8-4-3-7-15%2816%2911-17%2818%299-13%2814%295-1/h1-12H could not be loaded.