EC21 Buying Leads Catalogs - l-alanine http://importer.ec21.com/buy_leads/l-alanine.html Buy Offer To Buy; Cerebrolysin Concentratehttp://www.ec21.com/offer_detail/Buy_Offer_To_Buy_Cerebrolysin--7910124.htmlL-Alanine : 75.0 to 125.0 % (9) L-Proline : 75.0 to 125.0 % (10) L-Valine : 75.0 to 125.0 % (11) L-Methionine : 75.0 to20090413