4-Octanone, 5-hydroxy- 496-77-5 5-Hydroxy-4-octanone 5-Hydroxyoctan-4-one 5-Octanol-4-one AI3-05612 Butyroin EINECS 207-830-4 FEMA No. 2587 NSC 1479 Octan-4-ol-5-one