12275-37-5 12281-85-5 13870-80-9 3685-42-5 49871-83-2 5610-61-7 Bis(L-histidinato-N,O)copper Copper Histidine Copper histidinate Copper, bis(L-histidinato-N,O)- Copper, bis(L-histidinato-kappaN,kappaO)- L-Histidine, copper complex L-Histidine, copper(2+) salt (2:1)