ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1CN2%5BC%40%40H%5D%28CC3%3DCNC4%3DC3C2%3DCC%28%3DN%29C4%3DO%29OC1/file?format=sdf&get3d=True  -- C1CN2%5BC%40%40H%5D%28CC3%3DCNC4%3DC3C2%3DCC%28%3DN%29C4%3DO%29OC1 could not be loaded.