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nigang0924(½ð±Ò+6,VIP+0):лл 2-23 10:53
nigang0924(½ð±Ò+6,VIP+0):лл 2-23 10:53
| The hydrogen spectrum and carbon spectrum are different due to the different chemical environments of these two groups: one is close to benzene ring, and the other stretches outside. |
2Â¥2009-02-22 16:55:55













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