42. Which is the major product of the following reaction? (A) (B) (C) (D) (E)

問題詳情

42. Which is the major product of the following reaction?

(A)

(B)

(C)

(D)

(E)

參考答案

答案：A
難度：非常簡單0.944444
統計：A(17),B(0),C(0),D(0),E(1)