ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCN%28CC%29CCNC1%3DC2C%28%3DC%28C%3DC1%29CO%29SC3%3DCC%3DCC%3DC3C2%3DO/file?format=sdf&get3d=True -- CCN%28CC%29CCNC1%3DC2C%28%3DC%28C%3DC1%29CO%29SC3%3DCC%3DCC%3DC3C2%3DO could not be loaded.