conjugate of 4-{(2RS)-2-[bis(carboxymethyl)amino]-3-({2-[bis(carboxymethyl)amino]ethyl}(carboxymethyl)amino)propyl}phenyl isothiocyanate forming a thiourea with the 6-amino of a lysine of immunoglobulin G1, anti-(human episialin) (mouse monoclonal HMFG-1 γ1-chain), disulfide with mouse monoclonal HMFG-1 light chain, dimerisothiocyanate forming a thiourea with the 6-amino of a lysine of
