
H2SO4-SiO2催化7-羟基-4-甲基香豆素的无溶剂合成
秦省军;辛秀兰;徐宝财
H2SO4-SiO2催化7-羟基-4-甲基香豆素的无溶剂合成
Solventless synthesis of 7-hydroxy-4-methyl coumarin catalysed by H2SO4-SiO2
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