A NEW HYDROXYTETRADECATRIENOIC ACID AND ITS GLYCERYL ESTERS FROM VALSA-AMBIENS

A new hydroxytetradecatrienoic acid and its two glyceryl esters were i solated from a culture filtrate of Valsa ambiens. 1-Hydroxytetradecatr ienoyl-sn-glycerol and 3-hydroxytetradecatrienoyl-sn-glycerol, only di ffering in the configuration of carbon 2', were separated as their cor responding MTPA esters. The absolute stereochemistry of the asymmetric centre of the acid and the two asymmetric centres of the esters were determined by using advanced Mosher methodology. The glyceryl esters e xhibited an inhibitory effect on the growth of lettuce roots and hypoc otyls.