[H] [C@] 12 C [C@@] 3 [C@] ([H]) 4 ([H]) CC (C@) 5 ([H]) C [C@@H] (O) CC (C@) 5 (C) (C@@) 4 ([H]) CC (C@) 3 (C) [C@@] 1 [C@H] ([H]) (C) (C@@) 1 (CC (C@@H) (C) CO1) O2