ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1COCCN1CC2CN%28C%28%3DO%29O2%29/N%3DC/C3%3DCC%3DC%28O3%29%5BN%2B%5D%28%3DO%29%5BO-%5D/file?format=sdf&get3d=True  -- C1COCCN1CC2CN%28C%28%3DO%29O2%29/N%3DC/C3%3DCC%3DC%28O3%29%5BN%2B%5D%28%3DO%29%5BO-%5D could not be loaded.