ERROR opening https://cactus.nci.nih.gov/chemical/structure/C2%3DCN%28CC%28C%29N%29C1C2Cc3c1cc%28OC%29cc3/file?format=sdf&get3d=True  -- C2%3DCN%28CC%28C%29N%29C1C2Cc3c1cc%28OC%29cc3 could not be loaded.