80. The following reaction involves an intramolecular Michael reaction followed by an intramolecular aldol reaction. What is the major product of this reaction?
(A)
(B)
(C)
(D)
(E)
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統計: A(13), B(3), C(6), D(2), E(8) #2053877
統計: A(13), B(3), C(6), D(2), E(8) #2053877