在
                                                                                                                                                                                 
重铬酸吡啶                                                                                                                                  作用下,
                                                                                                                                                                                                                            以91%的产率得到2-amino-1-N-[(3R,6S,7R,10S,16S)-3-[(2S)-butan-2-yl]-7,11,14-trimethyl-2,5,9,12,15-pentaoxo-10-propan-2-yl-8-oxa-1,4,11,14-tetrazabicyclo[14.3.0]nonadecan-6-yl]-4,6-dimethyl-3-oxo-9-N-[(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]phenoxazine-1,9-dicarboxamide