【評論主題】65.5α-Androstane之A/B，B/C，C/D環之立體結構為何？(A)all cis(B)all trans(C)cis，trans，cis(D)trans，cis，trans
【評論內容】5α-cholestane: trans trans trans5β-cholestane: cis trans transBil.....看完整詳解