Unexpected condensation products from β-keto-δ-valerolactones were obtained. Theirstructures were confirmed by ’HNMR spectrum and elemental analysis.
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机译:矿山安全与健康管理局金属与非金属矿山安全与健康调查报告:表面非金属矿山尺寸石,致命动力拖运事故,2006年4月11日,1845年Texas stone products,Inc.,Texas stone products,Inc.,Lometa,Lampasas德克萨斯州郡,矿山ID第41-03518号。