D 2755 (OTTO) (+)-Dimethyl L-tartrate, 99% Cas 608-68-4 - used for the enantioselective epoxidation of allylic alcohols. D 2755 (OTTO) (+)-Dimethyl L-tartrate, 99% Cas 608-68-4 - used for asymmetric α-halogenation of acetals. It is a starting material for the synthesis of chiral building blocks.