Abstract
A nonvolatile and slightly water-soluble antimicrobial sulfur compound newly isolated from heated garlic extract was characterized. The compound was generated most when heated at 120°C for 30 minutes and completely disappeared after 90 minutes of heating. It has a molecular mass of 225 daltons with an elemental ratio of C6H11N1O2S3, and the interpretation of 1H- and 13C-nuclear magnetic resonance and Fourier transform-infrared data showed that the compound was CH2 = CH-CH2-S-S-S-CH2-CH(NH2)COOH, 3-(allyltrisulfanyl)-2-aminopropanoic acid, a derivative of cysteine, presumably derived from alliin (S-allyl-
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