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which are aromatic one-ring through seven-ring compounds with two methyl substituents.

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cailianguo(½ð±Ò+2, ·­ÒëEPI+1):ok£¬Ð»Ð»°ïÖú£¡ 2011-01-10 15:36:49
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Originally posted by cailianguo at 2011-01-10 15:20:39:

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cailianguo

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Originally posted by liufawen at 2011-01-09 21:58:30:
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Originally posted by cailianguo at 2011-01-10 07:57:29:

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