ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28OCC%28%3DO%29NCCCOc1cc%28ccc1%29CN2CCCCC2%29C/file?format=sdf&get3d=True -- O%3DC%28OCC%28%3DO%29NCCCOc1cc%28ccc1%29CN2CCCCC2%29C could not be loaded.