(S)-N-(3-Diazo-1-isobutylacetonyl)-p-toluenesulfonamide 72676-73-4 Benzenesulfonamide, N-(1-(diazoacetyl)-3-methylbutyl)-4-methyl-, (S)- (9CI) N-Tosyl-L-leucine diazomethyl ketone p-Toluenesulfonamide, N-(3-diazo-1-isobutylacetonyl)-, (S)-