ERROR opening https://cactus.nci.nih.gov/chemical/structure/C12%28c3c%28cccc3%29C%28O2%29%3DO%29c2c%28Oc3c1ccc%28c3%29O%29cc%28O%29cc2/file?format=sdf&get3d=True  -- C12%28c3c%28cccc3%29C%28O2%29%3DO%29c2c%28Oc3c1ccc%28c3%29O%29cc%28O%29cc2 could not be loaded.