ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DC%28C%28%3DC2CCC%28OC2%3DC1C%29%28C%29C%28%3DO%29O%29C%29O/file?format=sdf&get3d=True -- CC1%3DC%28C%28%3DC2CCC%28OC2%3DC1C%29%28C%29C%28%3DO%29O%29C%29O could not be loaded.