Ethyl (8Z,11Z,14Z)-octadeca-8,11,14,17-tetraenoate
https://www.kansasbio.org/shop/cell25sk9731-ethyl-8z-11z-14z-octadeca-8111417-tetraenoate-16031
https://www.kansasbio.org/web/image/product.template/16031/image_1920?unique=bdbccf1
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Ethyl (8Z,11Z,14Z)-octadeca-8,11,14,17-tetraenoate (8(Z),11(Z),14(Z),17(Z)-Octadecatetraenoic acid ethyl ester) is an ester product.
Internal Reference:
cell25sk9731