ERROR opening https://cactus.nci.nih.gov/chemical/structure/%5BCH-%5D1%5BNH%2B%5D%3DCO%5BPH2%2B%5D1/file?format=sdf&get3d=True -- %5BCH-%5D1%5BNH%2B%5D%3DCO%5BPH2%2B%5D1 could not be loaded.