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1楼 2015-03-07 10:28:33

已阅关注TA 给TA发消息送TA红花 TA的回帖

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There are only minor differences in NMR chemical shift among glucosyl glycine esters 15-18. Similar patterns were followed for glucosyl valine ethers 19-22. Take compound 19 as an example, the amide proton exhibited a chemical shift at around 8.21-8.23 ppm as a triplet. The 1H-NMR chemical shifts for hydroxyl groups linked to C2, C3, C4 and C6 were located at 5.10-5.11 ppm, 5.00-5.02 ppm, 5.26-5.27 ppm as doublets and 4.60-4.62 ppm as triplets, respectively. The 1H-NMR chemical shift of protons linked to C1, C2, C3, C4, C5, and C6 of the glucosyl ring were at 5.34-5.35 ppm as doublets, and 3.65–3.62, 3.47–3.42, 3.25–3.23, 3.22–3.19, 3.14–3.10 ppm of multiple-peaks. The chemical shift for CH2 groups on fatty chains were mainly located between 0.83 ppm to 2.14 ppm.

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2楼2015-03-07 14:24:48

已阅关注TA 给TA发消息送TA红花 TA的回帖

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nono2009: 金币-10, 屏蔽内容, 违规存档, 严禁回帖广告 2015-03-08 08:27:59

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3楼2015-03-07 16:52:25

已阅关注TA 给TA发消息送TA红花 TA的回帖

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