ERROR opening https://cactus.nci.nih.gov/chemical/structure/S%3DP%28Oc2noc%28c1ccccc1%29c2%29%28OCC%29OCC/file?format=sdf&get3d=True  -- S%3DP%28Oc2noc%28c1ccccc1%29c2%29%28OCC%29OCC could not be loaded.