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