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Shanghai Huifeng Technical & Business Co., Ltd??? ?? ??? ?????.
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Shanghai Huifeng Technical & Business Co., Ltd
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(8621)-52191009 (8621)-52191068
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tech@kjhuifeng.com.cn
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China
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www.kjhuifeng.com.cn
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C8H7NO2
C17H14N2O2
4,4'-?????(2,6-??????????)
C19H18N2O2
4,4-?????????????
C16H12N2O2
4,4'-[1,3-?????(1-??-????)]?????????
C26H24N2O2
???(1-??????)?-4,1-????????????
C17H14N2O2
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C24H22N2O2
1
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