ID 1.1.1.280 DE (S)-3-hydroxyacid-ester dehydrogenase. AN 3-oxo ester (S)-reductase. CA ethyl (S)-3-hydroxyhexanoate + NADP(+) = ethyl 3-oxohexanoate + H(+) + CA NADPH. CC -!- Also acts on 4-oxo- and 5-oxo-fatty acids and their esters. cf. CC EC 1.1.1.279. CC -!- Formerly EC 1.2.1.56. //