A novel sesquiterpene tactone,versicolactone A,with 12-carbonring skeleton,has been isolated from the roots of Aristolochia versicolarS.M.Hwang,and the structur
A fluoroimmunoassay method using unlabeled Terbium chelate isdescribed.The principle is similar to that of fluoroimmunoassay method usinglanthanide chelate as l