ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1CCCCN1CCCOC%28C2%3DCC%3DCC%3DC2%29%3DO/file?format=sdf&get3d=True  -- CC1CCCCN1CCCOC%28C2%3DCC%3DCC%3DC2%29%3DO could not be loaded.