(5-Acetyl-2,4-dihydroxy-3,3-dimethyl-6-oxo-cyclohexa-1,4-dienyl)-(5-acetyl-2,6-dihydroxy-3,3-dimethyl-4-oxo-cyclohexa-1,5-dienyl)-acetic acid 在
disodium hydrogenphosphate buffer 作用下,
以100%的产率得到4-Acetyl-2-[1-(5-acetyl-2,6-dihydroxy-3,3-dimethyl-4-oxo-cyclohexa-1,5-dienyl)-meth-(E)-ylidene]-5-hydroxy-6,6-dimethyl-cyclohex-4-ene-1,3-dione