ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc1c2C%28%3DO%29cc%28C%29C%28%3DO%29c2ccc1/file?format=sdf&get3d=True  -- Oc1c2C%28%3DO%29cc%28C%29C%28%3DO%29c2ccc1 could not be loaded.