Case C-510/06 P: Judgment of the Court (First Chamber) of 19 March 2009 — Archer Daniels Midland Co. v Commission of the European Communities (Appeal — Competition — Agreements, decisions and concerted practices — Sodium gluconate market — Fines — Guidelines on the method of setting fines — Community competition policy — Equal treatment — Turnover to be taken into account — Attenuating circumstances)