(6aR,7S,9aS,11S,13aS)-2,3,6,6a,7,8,9,9a,10,11,12,13-dodecahydro-11-hydroxy-5-dihydroxyphosphinyloxy-6a,7,10,10-tetramethyl-3-oxo-1H-benzo[8,8a][1]benzopyrano[2,3-e]isoindole ditriethylamine salt 在
sodium perchlorate 作用下,
以
甲醇 、
丙酮 为溶剂,
以120 mg (95%)的产率得到(6aR,7S,9aS,11S,13aS)-2,3,6,6a,7,8,9,9a,10,11,12,13-dodecahydro-11-hydroxy-5-dihydroxyphosphinyloxy-6a,7,10,10-tetramethyl-3-oxo-1H-benzo[8,8a][1]benzopyrano[2,3-e]isoindole monosodium salt