77160-98-6 Fl-Trh Fluorescein-thyrotropin-releasing hormone L-Prolinamide, 5-oxo-L-prolyl-L-histidyl-N-(6-((((3',6'-dihydroxy-3-oxospiro(isobenzofuran-1(3H),9'-(9H)xanthen)-5-yl)amino)thioxomethyl)amino)hexyl)-