[H] [C@@] 12 C [C@@H] ([C@H] (OC (= O) CC) [C@@] 1 (C) CC [C@@] ([H]) (C@@) 2 ([H]) CC (C@@) 2 ([H]) C [C@H] (OC (C) = O) [C@H] ([C@] 12 C) N1CCCCC1) [N +] 1 CCCCC1 (CC = C)