1. The use of a fatty acid derivative of the formula (I): in which L, M and N are hydrogen, hydroxyl group, halogen, lower alkyl, hydroxy (lower) alkyl, lower alkanoyloxy or oxo, where at least one of L and M groups different from hydrogen, and the five-membered ring may have at least one double bond； A is —CH or —CHOH, —COCHOH, —COOH or a functional derivative thereof； B is a single bond, —CH — CH—, —CH = CH—, -C≡C-, -CH-CH-CH-, -CH = CH-CH-, -CH-CH = CH-, -C≡C-CH- or -CH-C≡C-； Z is, or a single bond, where R and R are hydrogen, hydroxyl, halogen, nor lower alkyl, lower alkoxy or hydroxy (lower) alkyl, where R and R are not both hydroxy and lower alkoxy； R is a saturated or unsaturated divalent lower or middle aliphatic hydrocarbon residue which is unsubstituted or substituted with halogen, lower alkyl, hydroxyl group, oxo group, aryl a group or heterocyclic group, and at least one carbon atom in an aliphatic hydrocarbon is optionally substituted with oxygen, nitrogen or sulfur； and Ra is a saturated or unsaturated lower or middle aliphatic hydrocarbon residue which is unsubstituted or substituted by halogen, oxo group, hydroxyl group, lower alkyl, lower alkoxy； lower alkanoyloxy； cyclo (lower) alkyl； cyclo (lower) alkyloxy； aryl； an aryloxy, heterocyclic group or heterocyclooxy group； lower alkoxy； lower alkanoyloxy； cyclo (lower) alkyl； cyclo (lower) alkyloxy； aryl； aryloxy； a heterocyclic group； a heterocyclooxy group and at least one carbon atom in an aliphatic hydrocarbon is optional1. Применение производного жирной кислоты формулы (I):в которой L, М и N являются водородом, гидроксильной группой, галогеном, низшим алкилом, гидрокси(низшим)алкилом, низшим алканоилокси или оксо, где по меньшей мере одна из L и М групп отличается от водорода, и пятичленное кольцо может иметь по меньшей мере одну двойную связь；A является -CHили -CHOH, -COCHOH, -COOH или их функциональным производным；B является простой связью, -CH-CH-, -CH=CH-, -C≡C-, -CH-CH-CH-, -CH=CH-CH-, -CH-CH
