sodium 4-{[9-(1-aminoethyl)-24-(1-carboxyethyl)-15,21-bis(carboxymethyl)-34-methyl-6-(1-methylethyl)-5,8,11,14,17,20,23,26,32,36-decaoxotetratriacontahydro-1H,5H-pyrido[1,2-a]pyrrolo[1,2-y][1,4,7,10,13,16,19,22,25,28]decaazacyclohentriacontin-33-yl]amino}