SEARCH Articles Figures Tables 2,2,6,6-Tetramethyl-l-piperidinyloxy, free radical 2,2,6,6-tetramethyl-1 -piperidinyloxy 2,2,6,6-tetramethyl-1 -piperidinyloxy TEMPO) Radical 2,2,6,6-tetramethyl-l-piperidinyloxy TEMPO TEMPO 2,2,6,6-tetramethyl-l-piperidinyloxy) TEMPO free radical