trans-3,4-bis-(Methylmethanethiosulfonylmethyl)-2,2,5,5-tetramethylpyrrolidin-1-yloxyl radical

trans-3,4-bis(methylmethanethiosulfonylmethyl)-2,2,5,5-tetramethylpyrrolidin-1-yloxyl radical ; trans-3,4-bis[[(methylsulfonyl)thio]methyl]-2,2,5,5-tetramethylpyrrolidin-1-yloxyl radical ; 1-pyrrolidinyloxy,2,2,5,5-tetramethyl-3,4-bis[[(methylsulfonyl)thio]methyl]-, (3r,4r)-rel- (9ci)