4-(1-cyclopropylamino-2-hydroxyethyl)7-hydroxyindole-2-carboxylic acid ethyl ester hydrochloride 、
4-[N-benzyl-N-(2-methoxymethoxycarbonyl-1-methylethyl)aminoacetyl]-7-benzyloxyindole-2-carboxylic acid methoxymethyl ester acetate 生成 4-[1-hydroxy-2-(2-methoxymethoxycarbonyl-1-methylethylamino)ethyl]-7-hydroxyindole-2-carboxylic acid methoxymethyl ester acetate