5-Hiaa iodoglycyltyrosine 78044-52-7 Hiaa-igt Iodo-gly-tyr-5-hydroxyindole acetic acid Iodoglycyltyrosine 5-hydroxyindole acetic acid L-Tyrosine, N-(N-((5-hydroxy-1H-indol-3-yl)carbonyl)glycyl)-3-(iodo-125I)-