9. Select the correct name for the following compound. 
(A) 2-ethyl-3-pentene
(B) 4-ethyl-2-pentene
(C) 3-methyl-4-hexene
(D) 4-methyl-2-hexene
(E) none of these
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統計: 尚無統計資料
統計: 尚無統計資料