ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCCCC%3DCCC1OC1C%3DCC%28O%29CC%3DCCCCC%28%3DO%29O/file?format=sdf&get3d=True  -- CCCCCC%3DCCC1OC1C%3DCC%28O%29CC%3DCCCCC%28%3DO%29O could not be loaded.