(3S,3'S,3a'S,10a'S)-6-氯-3'-(3-氯-2-氟苯基)-1'-(环丙基甲基)-6'-甲基-2-氧代-3',3a',10',10a'-四氢-1'H-螺[吲哚啉-3,2'-吡咯并[2',3':4,5]吡咯并[1,2-b]吲唑]-7'-羧酸