ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1COCCN1C2%3DNC%28%3DO%29N%28C2%29C3%3DCC%3DC%28C%3DC3%29Cl/file?format=sdf&get3d=True  -- C1COCCN1C2%3DNC%28%3DO%29N%28C2%29C3%3DCC%3DC%28C%3DC3%29Cl could not be loaded.