3-{(1E,5E)-(R)-7-[(2R,4S,6R,9S)-4-(tert-Butyl-diphenyl-silanyloxy)-8,9-dimethyl-1,7-dioxa-spiro[5.5]undec-2-yl]-3,5-dimethyl-hepta-1,5-dienyl}-6-methoxymethoxy-4,7-dimethyl-isochroman-1-one 在
四丁基氟化铵 、 potassium hydride 作用下,
生成 2-[(1E,3E,7E)-(R)-9-((2R,4S,6R,8R,9S)-4-Hydroxy-8,9-dimethyl-1,7-dioxa-spiro[5.5]undec-2-yl)-1,5,7-trimethyl-nona-1,3,7-trienyl]-4-methoxymethoxy-5-methyl-benzoic acid 、 2-[(1E,3E,7E)-(R)-9-((2R,4S,6R,8S,9S)-4-Hydroxy-8,9-dimethyl-1,7-dioxa-spiro[5.5]undec-2-yl)-1,5,7-trimethyl-nona-1,3,7-trienyl]-4-methoxymethoxy-5-methyl-benzoic acid