26. 下列化合物正確的IUPAC系統命名為何?
(A) 1,4-dimethyl-2-ethylcyclopentane
(B) 1,3-dimethyl-4-ethylcyclopentane
(C) 1-ethyl-2,4-dimethylcyclopentane
(D) 1-ethyl-3,5-dimethylcyclopentane
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統計: A(28), B(16), C(233), D(3), E(0) #1978654
統計: A(28), B(16), C(233), D(3), E(0) #1978654