ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1%28%5BC%40%40%5D%28c2ccccn2%29%28OCCN%28C%29C%29C%29ccccc1/file?format=sdf&get3d=True -- c1%28%5BC%40%40%5D%28c2ccccn2%29%28OCCN%28C%29C%29C%29ccccc1 could not be loaded.