由二苯并-1,3-二氧杂 - 环辛烷 -2- 羧酸经两步反应制得, 总收率70%.It was prepared by the reaction of 12 H - dibenzo [ d , g ] [ 1,3 ] dioxocin - 6 - carboxylic acid with acetoxime.地衣是一类独特的生物有机体,其体内合成了多种特殊的次生代谢产物,主要为缩酚酸、缩酚酸环醚 、 缩酚酮、二苯并呋喃等类化合物.A l...
The former mayor of San Antonio is Hispanic.圣安东尼奥市的前任市长是拉美裔美国人。In five minutes, I went from Mayor Barclay to Captain Kangaroo!就5分钟我从巴克利市长变成袋鼠队长!It infuriates us to have to deal with this particular mayor.不得不跟这位市长打交道让我们大为...