质ACH3 CH3 H3CH3C OHcoH3CH3CC43H49N3O11:783.86(2S,20S,21S,22R,23R,24R,25S,26R,27S)-6,21,23-羟基-27-甲氧基-2,4,16,20,22,24,26-七甲基-11亚甲基1,5,15-三氧代-1,2,5,11四氢化-2,7-(环氧十五烷基[1,11,13]三烯亚胺基)呋喃并[2",3″:7,8萘并[1′,2′:4,5]咪唑并[1,2-a]吡啶-25-基醋酸酯杂质B CH3 CH3 HOH3CO、 H3C OH 0 OCH?NHCH3CH2 C43H49N3O1783.86 (2S,20S,21S,22R,23R,24R,25S,26R,27S)-5,21,23三羟基-27-甲氧基2,4,16,20,22,24,26-七甲基-11-亚甲基 1,6,15-三氧代-1,2,6,11-四氢化-2,7-(环氧十五烷基[1,11,13]三烯亚胺基)呋喃并[2",3″:7′,8勹萘并[1′,2′:4,5]咪唑并[1,2-a]吡啶-25-基醋酸酯