ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1ccc2c%28c1%29c%28ccc2n3c%28nnc3Br%29SCC%28%3DO%29O%29C4CC4/file?format=sdf&get3d=True -- c1ccc2c%28c1%29c%28ccc2n3c%28nnc3Br%29SCC%28%3DO%29O%29C4CC4 could not be loaded.