ChEBI: (E)-non-2-enoic acid is a monounsaturated fatty acid that is nonanoic acid which has undergone dehydrogenation to introduce a trans double bond at the 2-3 position. It is a medium-chain fatty acid, a monounsaturated fatty acid and an alpha,beta-unsaturated monocarboxylic acid. It is functionally related to an (E)-non-2-en-1-ol. It is a conjugate acid of an (E)-non-2-enoate.