ERROR opening https://cactus.nci.nih.gov/chemical/structure/%5BNH3%5D%20%5BPt%5D%28%5BNH3%5D%29%28Cl%29Cl/file?format=sdf&get3d=True -- %5BNH3%5D%20%5BPt%5D%28%5BNH3%5D%29%28Cl%29Cl could not be loaded.