M 2680 (OTTO) Methyl potassium malonate, 99% Cas 38330-80-2 - used in the total synthesis of (±)-vincorine, an akuammiline alkaloid which can find applications in biology. M 2680 (OTTO) Methyl potassium malonate, 99% Cas 38330-80-2 - used to synthesize a key keto proline ester intermediate to prepare acutumine.