93253-86-2 Dup 925 Dup-925 Hexapotassium-alpha-vanado-11-tungstoborate Vanadate(6-), (eicos-mu-oxoundecaoxoundecatungstate)tetra-mu-oxooxo(mu12-(tetrahydroxyborato(5-)-O:O:O:O':O':O':O'':O'':O'':O''':O''':O'''))-, hexapotassium