ERROR opening https://cactus.nci.nih.gov/chemical/structure/c4cccnc4C1%3DNC%28CCC%28%3DO%29OC%29c%28ncc2C%29n2-c%28cc3%29c1cc3Br/file?format=sdf&get3d=True  -- c4cccnc4C1%3DNC%28CCC%28%3DO%29OC%29c%28ncc2C%29n2-c%28cc3%29c1cc3Br could not be loaded.