138191-82-9 3-Maleimidopropionyl-arg-I-tyr 3-Maleimidopropionylarginylmonoiodotyrosine 3-Mpait L-Tyrosine, N-(N2-(3-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)-1-oxopropyl)-2-arginyl)-3-(ido-125I)-