ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29OC%28NC1%3DCC%3DCC%28%3DC1%29Cl%29%3DO/file?format=sdf&get3d=True  -- CC%28C%29OC%28NC1%3DCC%3DCC%28%3DC1%29Cl%29%3DO could not be loaded.