ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%3DCC%28%3DC%28C2%3DC1C%28%3DCN2%29CCN%29O%29O/file?format=sdf&get3d=True -- C1%3DCC%28%3DC%28C2%3DC1C%28%3DCN2%29CCN%29O%29O could not be loaded.