26-(2-Hydroxy-2-methylpropyl)-5,5-dimethyl-6,15-dioxahexacyclo[12.12.0.02,7.08,13.016,25.018,23]hexacosa-1(14),2(7),3,8,10,12,16(25),18,20,22-decaene-17,24-dione 、
乙酸酐 生成 [17-acetyloxy-26-(2-acetyloxy-2-methylpropyl)-5,5-dimethyl-6,15-dioxahexacyclo[12.12.0.02,7.08,13.016,25.018,23]hexacosa-1(14),2(7),3,8,10,12,16,18,20,22,24-undecaen-24-yl] acetate