ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%26%2361%3BC%28c1cc%28ccc1%29C%29N%28CC%29CC/file?format=sdf&get3d=True  -- O%26%2361%3BC%28c1cc%28ccc1%29C%29N%28CC%29CC could not be loaded.