ERROR opening https://cactus.nci.nih.gov/chemical/structure/OC1CCC%28N2CCCCC2%29%28C3%3DCC%3DCC%3DC3%29CC1/file?format=sdf&get3d=True -- OC1CCC%28N2CCCCC2%29%28C3%3DCC%3DCC%3DC3%29CC1 could not be loaded.