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......

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......

A pair of Z and E isomers of cyclization of γ-ketoacid 7,which was prepared in six steps from 2,5-dimethoxyphenyl aceti......

A perchoric acid-induced lactonization reaction of epoxy ester is described.Using lithium perchlorate, the ketone is obt......

The titled compound 6a and 6b were synthesized from tricyclic ketone 1 through five steps....