ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1cc2cccc3c4cc5cccc6cccc%28c4cc%28c1%29c23%29c56/file?format=sdf&get3d=True  -- c1cc2cccc3c4cc5cccc6cccc%28c4cc%28c1%29c23%29c56 could not be loaded.