Oct 16 (Reuters) - An Australian court has moved to

prevent U.S. drugmaker Cosette Pharmaceuticals from abandoning

its A$672 million ($437.6 million) acquisition of Mayne Pharma ( MAYNF )

, the ASX-listed company said on Thursday.

Cosette has been trying to terminate its offer, after saying

in May that it was reviewing the deal because of a "material

adverse change" in Mayne's performance.

($1 = 1.5356 Australian dollars)