9,12-Octadecadienoic acid (48 ) and 9,12,15-octadecatrienoic acid (52 ) 9,12-Octadecadienoic acid, (Z,Z)-/9,12,15-octadecatrienoic acid, (Z,Z,Z)- mixture Linoleic acid (48 ) / linolenic acid (52 ) mixture