21 嗎啡結構中有五個不對稱碳中心(chiral center),其C 5和C 6位置的立體絕對組態(absolute configuration) 為何?
(A) 5R, 6S
(B) 5S, 6S
(C) 5R, 6R
(D) 5S, 6R
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統計: A(219), B(32), C(51), D(113), E(0) #497120
統計: A(219), B(32), C(51), D(113), E(0) #497120