ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC12CCC3C%28C1CCC2%28C%29O%29CCC4%3DC%28C%28%3DO%29CCC34%29O/file?format=sdf&get3d=True -- CC12CCC3C%28C1CCC2%28C%29O%29CCC4%3DC%28C%28%3DO%29CCC34%29O could not be loaded.