D 2740 (OTTO) Dimethyl 2,3-O-isopropylidene-L-tartrate, 98% Cas 37031-29-1 - used as a starting material in the total synthesis of (+)-migrastatin and also in the synthesis of a structural analog of S-ribosylhomocysteinase (LuxS), which acts as a potent competitive inhibitor against LuxS.