(Propane-1,2-diyldiamine-N,N')silver(1+) bis(cyano-C)aurate(1-) 67906-15-4 EINECS 267-688-4 Silver isopropylenediamine gold cyanide Silver(1+), (1,2-propanediamine-kappaN,kappaN')-, bis(cyano-kappaC)aurate(1-)