ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCOc2nc1cccc%28C%28%3DO%29O%29c1n2Cc5ccc%28c3ccccc3c4nn%5BnH%5Dn4%29cc5/file?format=sdf&get3d=True  -- CCOc2nc1cccc%28C%28%3DO%29O%29c1n2Cc5ccc%28c3ccccc3c4nn%5BnH%5Dn4%29cc5 could not be loaded.