ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29O.CC%28C%29O.CC%28C%29O.O%3D%5BV%5D/file?format=sdf&get3d=True  -- CC%28C%29O.CC%28C%29O.CC%28C%29O.O%3D%5BV%5D could not be loaded.