为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

The title compound 2,2-dithiophene-naphthopyran (C21H14OS2, Mr = 346.44) was synthesized and characterized by IR, 1H NMR......