Look Back to the h于十击 Nomenclature IUPAC EST A&F The carboxyl group takes precedence over most other functional groups OH COOH (R)-5-Hydroxyhexanoic acid COOH H2N COOH 5-Oxohexanoic acid 4-Aminobutanoic acid Look Back to the Nomenclature - IUPAC ™The carboxyl group takes precedence over most other functional groups 5-Oxohexanoic acid 4-Aminobutanoic acid (R)-5-Hydroxyhexanoic acid CO O H OH CO O H H 2N C O O H O