Leelamine, Leelamine (dehydroabietylamine) is a diterpene amine that has a weak affinity for the cannabinoid receptors CB1 and CB2, as well as being an inhibitor of pyruvate dehydrogenase kinase. Optically active leelamine is also used as a chiral resolving agent for carboxylic acids. Rosin amine is mainly composed of dehydroabietylamine. It has extensive applications in the industry. Rosin acid takes rosin from living tree as raw material, after a series of distillation, the residual liquid of turpentine oil is steamed out, then filter it at 210℃ or so and cool and crystallize to get the finished product.