9Z,11E,13Z-Octadecatrienoicacid, methylester (Methyl punicate) is a fatty acid methyl ester, which can be isolated from seeds of Punica granatum L.. 9Z,11E,13Z-Octadecatrienoicacid, methylester exhibits antitumor efficacy, which interferes with tumor cell cycle, drug resistance and angiogenesis. 9Z,11E,13Z-Octadecatrienoicacid, methylester is the derivative of Punicic acid.