15670-79-8 25971-15-7 Cobalt, tetrakis((2,3-butanedione di(oximato-kappaN))(1-))bis(pyridine)di-, (Co-Co) EINECS 247-383-2 Tetrakis((butane-2,3-dione dioximato)(1-)-N,N')bis(pyridine)dicobalt, (Co-Co), stereoisomer