ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1%28C%28c2ccccc2%29%3DO%29c%28cc%28OC%29cc1%29O/file?format=sdf&get3d=True  -- c1%28C%28c2ccccc2%29%3DO%29c%28cc%28OC%29cc1%29O could not be loaded.