ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCNC%28%3DO%29CCCC%3DCCC1C%28CC%28C1C%3DCC%28CCC2%3DCC%3DCC%3DC2%29O%29O%29O/file?format=sdf&get3d=True -- CCNC%28%3DO%29CCCC%3DCCC1C%28CC%28C1C%3DCC%28CCC2%3DCC%3DCC%3DC2%29O%29O%29O could not be loaded.