S-Allylcysteine
S-Allylcysteine is an organosulfur compound that has the formula. It is the S-allylated derivative of the amino acid cysteine. As such only the L-enantiomer is significant biologically. SAC constituent of aged garlic. A number of related compounds are found in garlic, including the disulfide S-"allylmercaptocysteine" and γ-glutamyl-S-allylcysteine".
Allylcysteine is of interest for its potential medicinal properties. and as a chemopreventive.