試題詳解

46. The formula of brevicomin, a pheremone of the western pine beetle, is shown below. What open chain ketodiol would close to this bicyclic acetal? (ignore stereoisomer issues)  
(A) 7,8-dihydroxynonan-3-one
(B) 6,7-dihydroxynonan-3-one
(C) 7,8-dihydroxynonan-2-one
(D) 6,7-dihydroxynonan-2-one
(E) 6,7-dihydroxynonan-4-one