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Synthesis of 4,4′-dicarboxylbenzophenone with phase transfer catalysis
ZHANG Yan-jie, JIANG Wen-wei, YANG Qin, LUO Qin
China Surfactant Detergent & Cosmetics . 2015, (4): 210 -213 .  DOI: 10.13218/j.cnki.csdc.2015.04.007