... KGaA, Weinheim. Issue. European Journal of Organic Chemistry. Volume 2009, Issue 14, pages 2289–2292, May 2009. Additional Information. How to Cite. ... The organic phase was dried (Na 2 SO 4 ) and analysed by GC chromatography.24,25. ... J. Pain 1998 , 2 , 3 –14 . ...