S-Sinapyl-L-cysteine

Several bioactive compounds have been reported for pineapple fruit and juice, including the phenolic compounds p-coumaric, caflfeic, fer-rulic, and p-hydrobenzoic acids as well as vitamin C and carotenoids (Simon et al. 1992 Gardner et al. 2000). More recently, nine major phenolic compoimds were characterized and quantified in 54 commercial samples of pineapple juice concentrate samples— tyrosine, serotonin, di-metiiylhydroxylfuianone, dimethylhydroxylfiiranone b-glucoside, tryptophan, -sinapyl-L-cysteine, iV-g-L-glutamyl-5 -sinapyl-L-cysteine, S-sinapyl glutathione, and p-coumaric acid (Wen and Wrolstad 2002). 

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