ERROR opening https://cactus.nci.nih.gov/chemical/structure/n3c4cc5nc%28cc%5C1nc%28/C%3DC/1%29cc2ccc%28n2%29cc3CC4%29cc5/file?format=sdf&get3d=True  -- n3c4cc5nc%28cc%5C1nc%28/C%3DC/1%29cc2ccc%28n2%29cc3CC4%29cc5 could not be loaded.