Fusidic acid EP Impurity C

C[C@@H]1[C@H] (O) CC[C@@]2 (C) [C@H]1CC[C@@]3 (C) [C@H]2[C@H] (O) C[C@H]4\C (=C\5/CC[C@@H] (OC5=O) C (C) (C) O) \[C@H] (C[C@]34C) OC (=O) C

No