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2Â¥2018-10-13 06:37:57
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1H NMR spectra of 6c and 6e show that the signal arising from the phenylene protons H1 shifted upfield from 6.85 for 6c to 6.70 ppm for 6e. ·¢×ÔСľ³æIOS¿Í»§¶Ë |
3Â¥2018-10-13 13:51:01
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4Â¥2018-10-14 07:14:20
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8Â¥2018-10-16 12:11:26
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