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Sodium molybdate was reduced to produce ring-like compounds in the presence of carboxylic acids. Compound 1: Na8(H2O)28(H3O)+{Na(DMSO)2([MoVI10MoV8O52(OH)4(CH3C-OO)2]}(11H2O (C8H103O102Na9S2Mo18, Mr = 3829.85), where the {Mo18} ring is built up by two ace