ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCCCCCCCCCCCCCCOCC%28COP%28%3DO%29%28O-%29OCCN%20%28C%29%28C%29C%29OC%28%3DO%29C/file?format=sdf&get3d=True  -- CCCCCCCCCCCCCCCCOCC%28COP%28%3DO%29%28O-%29OCCN%20%28C%29%28C%29C%29OC%28%3DO%29C could not be loaded.