Eicosenoic acid may refer to one of three closely related chemical compounds:
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9-Eicosenoic acid (gadoleic acid), an omega-11 fatty acid (20:1ω11)
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11-Eicosenoic acid (gondoic acid), an omega-9 fatty acid (20:1ω9)
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13-Eicosenoic acid (paullinic acid), an omega-7 fatty acid (20:1ω7)
