ERROR opening https://cactus.nci.nih.gov/chemical/structure/COC1%3DCC%3DC%28C%3DC1%29C2%3DC%28ON%3DC2C3%3DCC%3DC%28C%3DC3%29OC%29CC%28%3DO%29O/file?format=sdf&get3d=True -- COC1%3DCC%3DC%28C%3DC1%29C2%3DC%28ON%3DC2C3%3DCC%3DC%28C%3DC3%29OC%29CC%28%3DO%29O could not be loaded.