ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCOC%28%3DO%29c1c2n%28cn1%29-c3cccc%28c3C%28%3DO%29N%28C2%29C%29I/file?format=sdf&get3d=True  -- CCOC%28%3DO%29c1c2n%28cn1%29-c3cccc%28c3C%28%3DO%29N%28C2%29C%29I could not be loaded.