... Download full text in PDF. Tetrahedron Letters, Vo1.22, No.22, pp 2103 - 2106 ... containing avenalumins was subjected to preparative thin layer chromatography [Kieselgel 60 G, E. Merck, 0.35mm, 20 x 20cm, developed with CHC13-Me0H-H20(65:35:10 by volume, lower layer ...