Cuprate(3-), aqua[[4,4',4'',4'''-(21-methyl-21H,23H-porphine-5,10,15,20- tetrayl)tetrakis(benzenesulfonato)](5-)-N(21),N(22),N(23), N(24)]-, stereoisomer, sodium salt with trifluoromethane- sulfonic acid (1:4:1) NSC319418