68009-97-2 AIDS-002887 AIDS002887 Heteropolyoxotungstate PM-3 PM-3 Tungstate(28-), tetrakis[m9-[arsenito(3-)-O:O:O:O':O':O':O'':O'':O'']]hexaheptaconta-m-oxodopentacontaoxotetraconta-, octacosapotassium