ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%5BAl%5D%28OC%28C%29%3DO%29OC%28C%29%3DO/file?format=sdf&get3d=True  -- O%5BAl%5D%28OC%28C%29%3DO%29OC%28C%29%3DO could not be loaded.