They were principally used to catalyze aldol, allylation, Diels - Alder, ene and Friedel - Crafts reactions.
它们主要被用来催化Aldol, 烯丙基化, Diels-Alder, Ene和 Friedel -Crafts等反应.
Brad Friedel restarts play with the free kick.
来自BBC
Maynor Figueroa produces a cross, save by Brad Friedel.
来自BBC
Centre by Giorgos Seitaridis, comfortable save by Brad Friedel.
来自BBC