ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28C%3D1C%3DCC%3DCC1C%29CCCN2CCC%28CC2%29CCCC/file?format=sdf&get3d=True  -- O%3DC%28C%3D1C%3DCC%3DCC1C%29CCCN2CCC%28CC2%29CCCC could not be loaded.