(SP-4-2)-Diaqua(1,2-ethanediamine-N,N')platinum(2+) 50475-23-5 52241-27-7 Diaquoethylenediamineplatinum(II) Platinum(2+), diaqua(ethylenediamine)-, cis- cis-Diaqua(ethylenediamine)platinum(2+)