操作系统(O) (= O) = O . [H] [C@@] 12 oc3 = C (O) C = CC4 = C3 (C@@) 11 ccn (C) [C@] ([H]) (C4) [C@] 1 ([H]) C = C (C@) 2 ([H]) O . [H] [C@@] 12 oc3 = C (O) C = CC4 = C3 (C@@) 11 ccn (C) [C@] ([H]) (C4) [C@] 1 ([H]) C = C [C@] 2 [H] O

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