英文别名2,2,5,5-Tetramethyl-3-carboxypyrrolidine-N-oxyl; pca(radical); 4-carboxy-PROXYL; 1-oxyl-2,2,5,5-tetramethylpyrroline-3-carboxylic acid; 3-CARBOXY-PROXYL,FREE RADICAL; 1-oxyl-2,2,5,5-tetramethylpyrrolidine-3-carboxylic acid radical; Carboxyproxyl; 4-carboxy-2,2,5,5-tetramethyl-1-pyrrolidinyloxyl radical; 3-Carboxy-PROXYL; 1-Hydroxy-2,2,5,5-tetramethyl-3-pyrrolidinecarboxylic acid; 3-Carboxy-2,2,5,5-tetramethylpyrrolidine 1-Oxyl Free Radical; 3-carboxy-2,2,5,5-tetramethylpyrrolidine-N-oxyl radical; 3-CARBOXY-2,2,5,5-TETRAMETHYL-1-PYRROLIDINE-1-OXYL; 3-CARBOXY-2,2,5,5-TETRAMETHYL-1-PYRROLIDINYLOXY; 3-CARBOXY-2,2,5,5-TETRAMETHYLPYRROLIDINE 1-OXYL; 3-CARBOXY-2,2,5,5-TETRAMETHYLPYRROLIDINYL-1-OXY 
