ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DC2C%28%3DO%29N%3DC%28NN2C%28%3DN1%29%5BC%40%40H%5D%28CCCC3%3DCC%3DCC%3DC3%29%5BC%40%40H%5D%28C%29O%29CC4%3DCC%28%3DC%28C%3DC4%29OC%29OC/file?format=sdf&get3d=True  -- CC1%3DC2C%28%3DO%29N%3DC%28NN2C%28%3DN1%29%5BC%40%40H%5D%28CCCC3%3DCC%3DCC%3DC3%29%5BC%40%40H%5D%28C%29O%29CC4%3DCC%28%3DC%28C%3DC4%29OC%29OC could not be loaded.