M 1771 (OTTO) Merrifiels resin 2% crossilinked, 200-400 mesh Cas 55844-94-5 - used in Solid-phase synthesis. M 1771 (OTTO) Merrifiels resin 2% crossilinked, 200-400 mesh Cas 55844-94-5 - used in the Merrifield Synthesis of polypeptide chains, facilitated by DCC.