The 1 Iodo 3,13 diacetyl 9 ene 16 one 19,2 lactone,gibberellic acid, 7 methyl ester was synthesized from gibberellic acid 7 methyl ester by the iodolactonization and ozonization reactions.

• 报道 1 碘 3 ,13 二乙酰基 9 烯 16 酮 19,2 内酯赤霉酸甲酯的合成。