20. Which of the following pairs of compounds would be the most reasonable choice for an attempt at a "mixed" or "crossed" aldol condensation?
(A)
(B)
(C)
(D)
(E)

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統計: A(1), B(17), C(1), D(7), E(1) #1026905

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#4695584
選一片有alpha H,另一片沒有,以避...
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