Benzylsulfonamide was used as a source of nitrogen in the syn-thesis of azacrown ethers,and the cyclic intermediates were easily deben-zylsulfonylated by treati
Normal Haman Spectra(NRS) of solid PMT (1-phenyl-5-mercaptotetrazole) and MBT (2-mercaptobenzothiazole) and their surface enhanced Raman spectra (SERS) adsorbed
The azeotrope disappeared when the formic acid-water mixtureswere treated by membrane distillation. Membrane distillation were used forseparation of formic acid
The complex K<sub>3</sub>H<sub>4</sub>GeW<sub>9</sub>V<sub>3</sub>O<sub>40</sub>·8H<sub>2</sub>O crystallized in a monocliinie system with space group P2,
a new triterpene compound was isolated from the stems and leaves of Panax ginseng C. A. Meyer and established as 3β, 6α, 12β-trihydroxy-dammar-20(21), 24-die