[1] ARS, USDA, So Weed Res Unit, Stoneville, MS 38776 USA
[2] Univ Minnesota, Dept Med Chem, Minneapolis, MN 55455 USA
[3] Seoul Natl Univ, Dept Agr Biol, Coll Agr & Life Sci, Suwon 441744, South Korea
[4] Seoul Natl Univ, Res Ctr New Biomat Agr, Coll Agr & Life Sci, Suwon 441744, South Korea
[5] US FDA, Ctr Food Safety & Appl Nutr, Washington, DC 20204 USA