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Seedlings of wheat, oat and red cabbage and flower buds of petunia were supplied with ʟ-methionine (methyl-14C). Cinnamic acids and anthocyanins were purified by thin layer chromatography to constant specific activity. The methylated compounds had an 16-30 fold higher activity than the non-methylated ones. By splitting with hydroiodic acid it was shown that the methyl groups of cinnamic acids and anthocyanins contained radioactivity. Therefore the O-methylgroups of both cinnamic acids anddoi:10.1515/znb-1964-0212 fatcat:lis3qrmbbfbennse77hfd2lg4y