20 海洛因(Heroin)是嗎啡結構何位置的衍生物?
(A) 1,4-diacetyl derivative
(B) 2,5-diacetyl derivative
(C) 3,6-diacetyl derivative
(D) 2,6-diacetyl derivative
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統計: A(12), B(7), C(94), D(30), E(0) #644755
統計: A(12), B(7), C(94), D(30), E(0) #644755