甲醇 、 10,12-dimethyl-2-oxo-3-phenyl-5-N,7-N-bis[(3R,6S,7R,10S,16S)-7,11,14-trimethyl-2,5,9,12,15-pentaoxo-3,10-di(propan-2-yl)-8-oxa-1,4,11,14-tetrazabicyclo[14.3.0]nonadecan-6-yl]-6H-[1,4]oxazino[3,2-b]phenoxazine-5,7-dicarboxamide 在
platinum(IV) oxide 氢气 作用下,
以87%的产率得到methyl 2-((1,9-bis(((6S,9R,10S,13R,18aS)-6,13-diisopropyl-2,5,9-trimethyl-1,4,7,11,14-pentaoxohexadecahydro-1H-pyrrolo[2,1-i][1]oxa[4,7,10,13]tetraazacyclohexadecin-10-yl)carbamoyl)-4,6-dimethyl-3-oxo-3H-phenoxazin-2-yl)amino)-2-phenylacetate