ERROR opening https://cactus.nci.nih.gov/chemical/structure/OC%28%3DO%29c1cc%28Br%29c%28cc1%29c2c%28Br%29c%28Br%29c%28cc2%29C%28%3DO%29O/file?format=sdf&get3d=True -- OC%28%3DO%29c1cc%28Br%29c%28cc1%29c2c%28Br%29c%28Br%29c%28cc2%29C%28%3DO%29O could not be loaded.