trimethyl 2-pentadecanylphosphonoacetate 、
15-methoxymethoxy-3-(5-spiro-2,2-dimethyl-1,3-dioxacyclopentyl)-1-pentadecanal 在
lithium diisopropyl amide 作用下,
生成 methyl 17-methoxymethoxy-2-pentadecanyl-5-(5-spiro-2,2-dimethyl-1,3-dioxacyclopentyl)-2-heptadecenoate