1. a Department of Chemistry and Pharmaqam Center , Université du Québec à Montréal (UQAM) , CP 8888, Succ. Centre-ville, Montréal , QC , Canada , H3C 3P8
2. b Agriculture and Agri-Food Canada, Dairy and Swine Research and Development Centre , Lennoxville , QC , Canada , J1M 1Z3