2-[(2R,5S,6R)-6-((S)-sec-Butyl)-5-methyl-5,6-dihydro-2H-pyran-2-ylmethyl]-2,3-dihydro-pyran-4-one 在
sodium tetrahydroborate 、 cerium(III) chloride 作用下,
生成
(2S,4S)-2-[(2R,5S,6R)-6-((S)-sec-Butyl)-5-methyl-5,6-dihydro-2H-pyran-2-ylmethyl]-3,4-dihydro-2H-pyran-4-ol