Three rare-earth-containing heteropolyoxometalates with different sizes, Na9[Eu(W5 O18)2], K13[Eu(SiW11O39)2], and K17[Eu(P2W17O61)2], have been incorporated by
Self-ordering of the cell arrangement of the anodic porous alumina was prepared in oxalic acid solution at a constant potential of 40V and at a temperature of 2
From the barks of Taxus yunnanensis, a new paclitaxel-related compound, 7-xylosyl-taxol D (1), and three new 11(15?1)-abeotaxoids, taxuyunnanines P-R (2-4) have