Comparative methods for the radiolabeling of peptides.

Structure	Name/CAS No.	Molecular Formula	Articles
	Benzenepropanoic acid,4-hydroxy-, 2,5-dioxo-1-pyrrolidinyl ester CAS:34071-95-9	C₁₃H₁₃NO₅
	1,3,4,6-Tetrachloro-3a,6a-diphenylglycouril CAS:51592-06-4	C₁₆H₁₀Cl₄N₄O₂