ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1CN%3DC%28N1%29NC2%3DC%28C%3DCC3%3DNSN%3DC32%29Cl/file?format=sdf&get3d=True  -- C1CN%3DC%28N1%29NC2%3DC%28C%3DCC3%3DNSN%3DC32%29Cl could not be loaded.