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......

25,27-Dipropoxy-p-tert-butylcalix[4]crown-9 cone conformer 5 was readily synthesized via an intramolecular cyclization s......

25,27-Dipropoxy-p-tert-butylcalix [4 ] crown-9 锥 conformer 5 乐意地在好收益经由 intramolecular 环合策略被综合。包含的所......