試題詳解

66. Rank the degree of unsaturation in each of the following compounds. I. Cholesterol , C₂₇H₄₆O II. DDT, C₁₄H₉Cl₅ III. Prostaglandin E1, C₂₀H₃₄O₅ IV. Caffeine , C₈H₁₀N₄O₂
(A) I ＞ III ＞ II ＞ IV
(B) II ＞ IV ＞ I ＞ III
(C) I ＞ II ＞ III ＞ IV
(D) II ＞ IV ＞ III ＞ I
(E) I ＞ IV ＞ II ＞ III