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terry_well
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- ·ÒëEPI: 160
- Ó¦Öú: 207 (´óѧÉú)
- ¹ó±ö: 1.508
- ½ð±Ò: 3769.8
- É¢½ð: 9654
- ºì»¨: 229
- ɳ·¢: 11
- Ìû×Ó: 5857
- ÔÚÏß: 601.1Сʱ
- ³æºÅ: 352600
- ×¢²á: 2007-04-22
- ÐÔ±ð: GG
- רҵ: ȼÉÕѧ
- ¹ÜϽ: ÁôѧÉú»î
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hmily601(½ð±Ò+50, ·ÒëEPI+1): лл ÐÁ¿àÄãà¶£¡£¡ 2011-12-12 00:13:29
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According to the law of displacement for flavonoid O-glycoside daidzein glycosides¡ According to the literature [3], the glycosides for hydroxyl of sugar occur will induce a low-field shift for the carbon atoms connected to ¨COH groups and the chemical shifts for C-6 of galactose was about 62.0ppm before glycoside. Based on the 12C-NMR of compound 1, it was shown that there were four chemical shifts namely 65.4, 66.9, 68.0 and 69.9 ppm. Such signal mentioned above was obviously in the low-field, which was changed to low-field by +4 to +6 units compared with the C-6 chemical shifts for galactose before glycosides. This might correspond to the signal of a 4.5 galactose C-6. According to the above analysis, it was confirmed that C-6 bits of 4.5 galactose had changed into glycosides. ½ñÌìÓпգ¬¸øÄã¶¼·ÒëÁË¡£ |

2Â¥2011-12-12 00:00:44
hmily601
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- ³æºÅ: 823643
- ×¢²á: 2009-08-07
- ÐÔ±ð: GG
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3Â¥2011-12-12 00:18:54














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