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594306435(金币+20, 翻译EPI+1): 谢谢 2011-04-16 18:58:34
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As shown in Fig.5-4 , compound 29m did not show absorption peak at about δ13.49 , this showed carboxyl group disappeared ; At δ9.08-7.00 the absorption peaks were attributed to absorption peaks which were from nine hydrogen proton on quinoline ring and benzene ring . At δ5.92-5.87 the absorption peaks were attributed to absorption peaks which were from hydrogen proton on -CH of pyrane ring , there was a comparely strong single peak at δ3.79 and it was attributed to absorption peaks of three hydrogen proton on -OCH3 , there was absorption peaks at δ 3.45-3.35 and it was attributed to absorption peaks of two hydrogen proton on –CH2 of pyrane ring . |
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