ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28OCCOCn1c2N%5CC%28%3DN/C%28%3DO%29c2nc1%29N%29%5BC%40%40H%5D%28N%29C%28C%29C/file?format=sdf&get3d=True -- O%3DC%28OCCOCn1c2N%5CC%28%3DN/C%28%3DO%29c2nc1%29N%29%5BC%40%40H%5D%28N%29C%28C%29C could not be loaded.