3-[2-(2-Bromoacetamido)acetamide]-PROXYL;3-[2-(2-BROMOACETAMIDO)ACETAMIDE]-PROXYL, FREE RADICAL;3-[2-(2-BROMOACETAMIDO)ACETAMIDO]-2,2,5,5-TETRAMETHYL-1-PYRROLIDINOXY;3-[2-(2-BROMOACETAMIDO)ACETAMIDO]-PROXYL;3-(2-(2-BROMOACETAMIDO)ACETAMIDO)-PROXYL FREE R