1. A trans-2-decenoic acid derivative represented by the following general formula (I ′) or a pharmaceutically acceptable salt thereof: wherein X ′ is: (a) 1-pyrrolidyl substituted with carboxyl or alkoxycarbonyl, (b) 3-thiazolidyl, (c) piperidino substituted with alkyl, oxo, hydroxy, alkoxy, carboxyl, alkoxycarbonyl, alkylamino, alkylaminoalkyl, phenyl, carboxyalkyl, alkoxycarbonylalkyl, cyano or halogenophenyl, (d) thiomorpholino, (e) 1-piperazyl, which may be substituted carboxyalkyl, alkoxycarbonylalkyl, alkyl n-alkyl, cycloalkyl, piperidinoalkyl, phenylalkyl, pyridyl, pyrimidyl, carboxyphenylalkyl or alkoxycarbonylphenylalkyl, (f) 1-piperazyl substituted by phenyl, which may be substituted by alkylamino, halogen, alkoxy, alkoxyalkylalkyl, alkyl -diazepanyl, which may be substituted by alkyl or alkylaminoalkyl, or (h) carboxymorpholino. 2. The trans-2-decenoic acid derivative or a pharmaceutically acceptable salt thereof according to claim 1, wherein X 'is 1-pyrrolidyl substituted with carboxyl or alkoxycarbonyl. 3. The trans-2-decenoic acid derivative or a pharmaceutically acceptable salt thereof according to claim 1, wherein X 'is 3-thiazolidyl, thiomorpholino or carboxymorpholino. 4. The trans-2-decenoic acid derivative or a pharmaceutically acceptable salt thereof according to claim 1, wherein X ′ is piperidino substituted with alkyl, oxo, hydroxy, alkoxy, carboxyl, alkoxycarbonyl, alkylamino, alkylaminoalkylphenyl, carboxyalkyl, alkoxycarbonylalkyl, cyano or halo phenyl. . Derivative of trans-2-decenoic acid or its pharmaceutically acceptable salt according to claim 1, where X 'pre1. Производное транс-2-деценовой кислоты, представленное следующей общей формулой (I') или его фармацевтически приемлемая соль:,где X' представляет собой:(a) 1-пирролидил, замещенный карбоксилом или алкоксикарбонилом,(b) 3-тиазолидил,(c) пиперидино, замещенный алкилом, оксо, гидрокси, алкокси, карбоксилом, алкоксикарбонилом, алкиламино, алкиламиноалкилом, фенилом, карбоксиалкилом,
