Acetic acid (5E,9E)-1-acetoxymethyl-2,14,18,22,26,30-hexahydroxy-2,6,10,14,18,22,26,30,34-nonamethyl-pentatriaconta-5,9,33-trienyl ester 在
N-溴代丁二酰亚胺(NBS) 作用下,
以
叔丁醇 为溶剂,
生成 Acetic acid (5E,9E)-1-acetoxymethyl-33-bromo-2,14,18,22,26,30,34-heptahydroxy-2,6,10,14,18,22,26,30,34-nonamethyl-pentatriaconta-5,9-dienyl ester