(2S,3R,4S,5R,6R)-2-(((1S,2R,3R)-1-((6R)-4-(6-(2-((2,6-二氯苯基)氧)乙氧基）己基)-2-羟基-6-(4-羟基-3-(羟甲基)苯基)吗啉基-2-基)-1,3,4-三羟基丁烷-2-基)氧基)-6-(羟甲基)四氢-2H-吡喃-3,4,5-三醇；三苯乙酸维兰特罗杂质9；维兰特罗杂质27