ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DC%28C%28%3DCC%3DC1%29C%29N%28C%28C%29C%28%3DO%29OC%29C%28%3DO%29COC/file?format=sdf&get3d=True  -- CC1%3DC%28C%28%3DCC%3DC1%29C%29N%28C%28C%29C%28%3DO%29OC%29C%28%3DO%29COC could not be loaded.