S-methyl methane thiosulfonate, a new antimutagenic compound isolated from Brassica oleracea L. var. botrytis.

Though various antimutagens with desmutagenic activities have been found in our daily foods of plant origin, the numbers of antimutagens with bio-antimutagenic activities found so far are limited. In the present study, a compound with potential bio-antimutagenic activity to Escherichia coli B/r WP2 was newly isolated from cauliflower, Brassica oleracea L. var. botrytis, and its chemical structure was identified to be S-methyl methane thiosulfonate by NMR and MS analysis.