ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC1O%5BC%40%40H%5D%28CNC%20%28%3DO%29%20C%29%20CN1c3cc%20%28F%29%20c%20%28N2CCOCC2%29%20cc3/file?format=sdf&get3d=True -- O%3DC1O%5BC%40%40H%5D%28CNC%20%28%3DO%29%20C%29%20CN1c3cc%20%28F%29%20c%20%28N2CCOCC2%29%20cc3 could not be loaded.