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chem.wan(½ð±Ò+6,VIP+0):·Ç³£¸Ðл 1-7 22:48
chem.wan(½ð±Ò+6,VIP+0):·Ç³£¸Ðл 1-7 22:48
| Under the identical reaction condition, A can not be obtained possibly due to the over large steric hindrance making C fail to approach. |
2Â¥2010-01-07 22:10:43














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