根据下文回答第 173~176 题。A.5,7,4'-三羟基黄酮B.5,7,3',4'-四羟基黄酮C.3,5,7,4'-四羟基黄酮D.3,5,7,3',4'-五羟基黄酮E.3,5,7,3',4',5'-六羟基黄酮第 173 题 山奈酚的结构为( )
根据下文回答第 173~176 题。
A.5,7,4'-三羟基黄酮
B.5,7,3',4'-四羟基黄酮
C.3,5,7,4'-四羟基黄酮
D.3,5,7,3',4'-五羟基黄酮
E.3,5,7,3',4',5'-六羟基黄酮
第 173 题 山奈酚的结构为( )
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槲皮素的结构是A.5,7,4‘-三羟基黄酮B.5,7,3‘,4‘-四羟基黄酮C.3,5,7,4‘-四羟基黄酮D.3,5,7,3‘,4‘-五羟基黄酮E.3,5,7,3‘,4‘,5‘-六羟基黄酮
(86~87题共用备选答案)A.5,7,4'-三羟基黄酮B.5,7,3',4'-四羟基黄酮C.3,5,7,4'-四羟基黄酮D.3,5,7,3,4'-五羟基黄酮E.3,5,7,3',4',5'-六羟基黄酮木犀草素的结构是
A.5,7,3′,4′-四羟基黄酮B.5,7,4′-三羟基黄酮C.3,5,7,3′,4′-五羟基黄酮D.3,5,7,3′,4′,5′-六羟基黄酮E.3,5,7,4′-四羟基黄酮木犀草素的结构是
A.5,7,3′,4′-四羟基黄酮B.5,7,4′-三羟基黄酮C.3,5,7,3′,4′-五羟基黄酮D.3,5,7,3′,4′,5′-六羟基黄酮E.3,5,7,4′-四羟基黄酮槲皮素的结构是
槲皮素的结构为()。A5,7,3’-三羟基础黄酮B5,7,3’4’-四羟基黄酮C3,5,7,3’,4’-四羟基黄酮D3,5,7,4’-五羟基黄酮E3,5,7,3’4’5’-六羟基黄酮