ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%26%2361%3B1S/C18H16/c1%285-11-17-13-7-3-8-14-17%292-6-12-18-15-9-4-10-16-18/h1-16H/b2-1%2B%2C11-5%2B%2C12-6%2B/file?format=sdf&get3d=True  -- InChI%3DInChI%26%2361%3B1S/C18H16/c1%285-11-17-13-7-3-8-14-17%292-6-12-18-15-9-4-10-16-18/h1-16H/b2-1%2B%2C11-5%2B%2C12-6%2B could not be loaded.