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C. A. Bartram, D. A. Battye and C. R. Worthing
898. Some 2,5-dialkoxyphenols
J. Chem. Soc., 1963, 4691 - 4693
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http://dx.doi.org/10.1039/JR9630004691Hermann Irngartinger
Synthesis, X-ray Structure Analysis and Topochemical Photopolymerization of Substituted 1,6-Bis(2,5-dimethoxyphenyl)hexa-2,4-diynes
European Journal of Organic Chemistry
Volume 1999 Issue 4, Pages 917 - 922
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http://dx.doi.org/10.1002/(SICI)1099-0690(199904)1999:4<917::AID-EJOC917>3.0.CO;2-B