In a supporting electrolyte containing 0.6mol/L H<sub>2</sub>SO<sub>4</sub>,asensitivity derivative wave of 2-AES is formed by oscillopolarography.Thepeak poten
The seleno substituted aromatic compounds were prepared via theDiels-Alder reaction of seleno substituted 3-sulfolenes with dimethylacetylenedicarboxylate follo
Two new tetracyclic taxane diterpenoids----yunnanxol(1)and yunnanxamine(2)have been isolated from the bark of Taxusyunnanensis Cheng et L.K.Fu.Their structures have