It was prepared by the reaction of 12 H - dibenzo [ d , g ] [ 1,3 ] dioxocin - 6 - carboxylic acid with acetoxime.由二苯并-1,3-二氧雜 - 環辛烷 -2- 羧酸經兩步反應制得, 總收率70%....
Daniel's few encounters with Gold had been characterized by a laboured politeness.丹尼爾與戈爾德的幾次碰面都只是虛禮客套一番。Encounters of like charges act to diminish the coagulation rate.同性帶電粒子間的碰撞作用減少凝聚率.She had heard of these encoun...