New Hydroxy Fatty Acids from Bombyx mori Droppings.

A new hydroxy fatty acid, named bombyxmoric acid methyl ester ( 1), along with three known ones, 12(S)-methyl 12-hydroxyoctadeca-9Z,13E,15Z-trienoate ( 2), 13(S)-methyl 13-hydroxyoctadeca-9Z, 11E-dienoate ( 3), and 13(S)-hydroxyoctadeca-9Z,11E-dienoic acid ( 4), were isolated from Bombyx mori droppings. The structure of compound 1 was established as methyl 7-hydroxyoctadeca-8E,10Z,15E-trienote on the basis of spectroscopic methods including HR-EI/MS, IR, 1D, and 2D NMR experiments. [ABSTRACT FROM AUTHOR]