Asymmetric 1, 3 - dipolar cycloaddition can be strongly catalyzed by chiral oxazaborolidines.手性唑硼烷酮能够催化不对称1, 3偶极加成反应并取得很好的效果.Most people's faces are asymmetric.大多数人的脸不对称。There are two DesB 1 - DPI moleCUles in an as...
" Tom, " whispered Huckleberry, " does this keep us from ever telling -- always? "“ 汤姆, ” 哈克贝利小声问道, “ 这样一来, 我们将不会泄密, 永远都不会,是 吗 ? ”Somebody pinched his arm. He turned, and his eyes met Huckleberry's.这时有人在他胳膊上拧了一下, 他转...
他们还留下了一张名片，上面印着肖恩·林奇的名字。They also left a card, imprinted with the name Sean Lynch.这个叫杰克·史密斯的家伙是不是还有个名字叫杰凯尔？This guy, Jack Smith, does he go by the name of Jackal?她费劲地读着石柱上的名字。She strove to read the name on the stone pill...