M 2653 (OTTO) Methyl crotonate, 98% Cas 623-43-8 - used to investigate chemoselectivity in the reaction between methyl crotonate and benzylamine catalyzed by lipase B from Candida antarctica using solvent engineering. M 2653 (OTTO) Methyl crotonate, 98% Cas 623-43-8 - used as starting reagent during the total synthesis of phytotoxins solanapyrones D(1) and E(2).