2,2-Dimethyl-propionic acid 5-(2-{benzyl-[2-(2-phenyl-propionylamino)-ethyl]-amino}-acetyl)-2-(2,2-dimethyl-propionyloxy)-phenyl ester 生成 2,2-Dimethyl-propionic acid 2-(2,2-dimethyl-propionyloxy)-5-{1-hydroxy-2-[2-(2-phenyl-propionylamino)-ethylamino]-ethyl}-phenyl ester