(S)-5-Guanidino-2-[(R)-2-(3-guanidino-propionylamino)-3-mercapto-propionylamino]-pentanoic acid ((S)-1-{(S)-1-[2-(4-hydroxy-phenyl)-ethylcarbamoyl]-2-mercapto-ethylcarbamoyl}-2-naphthalen-2-yl-ethyl)-amide 在
ammonium hydroxide 、
air 作用下,
以6.5 mg的产率得到(4S,7S,10S,13R)-13-(3-Guanidino-propionylamino)-10-(3-guanidino-propyl)-7-naphthalen-2-ylmethyl-6,9,12-trioxo-1,2-dithia-5,8,11-triaza-cyclotetradecane-4-carboxylic acid [2-(4-hydroxy-phenyl)-ethyl]-amide