ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1CNCCC1%3DC2C3%3DC%28C%28%3DO%29CC4%3DCC%3DCC%3DC42%29SC%3DC3/file?format=sdf&get3d=True -- C1CNCCC1%3DC2C3%3DC%28C%28%3DO%29CC4%3DCC%3DCC%3DC42%29SC%3DC3 could not be loaded.