Tert-butyl 26,27-dihydroxy-14,24-dimethoxy-28-azatetracyclo[20.3.1.15,8.112,16]octacosa-1(25),5,7,12,14,16(27),22(26),23-octaene-28-carboxylate 以88%的产率得到14,24-Dimethoxy-28-azatetracyclo[20.3.1.15,8.112,16]octacosa-1(25),5,7,12,14,16(27),22(26),23-octaene-26,27-diol