50792-65-9 Iron, (7,16-dihydrodibenzo(b,i)(1,4,8,11)tetraazacyclotetradecinato(2-)-N5,N9,N14,N18)-, (SP-4-1)- Iron, (7,16-dihydrodibenzo(b,i)(1,4,8,11)tetraazacyclotetradecinato(2-)-kappaN5,kappaN9,kappaN14,kappaN18)-, (SP-4-1)-