1'-acetyl-4-acetyloxy-6'-bromo-4-methyl-2'-oxo-12,14-bis(phenylmethoxy)spiro[2,9,11,13-tetrazatricyclo[8.4.0.03,7]tetradeca-1(10),2,11,13-tetraene-5,3'-indole]-6-carboxylic acid 、 (1S,2R,6S,7R,8R,9R)-8-(methoxymethoxy)-4,4-dimethylspiro[3,5,10,12-tetraoxatricyclo[7.3.0.02,6]dodecane-11,1'-cyclohexane]-7-ol 生成 [(1R,2S,6R,7R,8S,9R)-8-(methoxymethoxy)-4,4-dimethylspiro[3,5,10,12-tetraoxatricyclo[7.3.0.02,6]dodecane-11,1'-cyclohexane]-7-yl] 1'-acetyl-4-acetyloxy-6'-bromo-4-methyl-2'-oxo-12,14-bis(phenylmethoxy)spiro[2,9,11,13-tetrazatricyclo[8.4.0.03,7]tetradeca-1(10),2,11,13-tetraene-5,3'-indole]-6-carboxylate