** Shares of Neuren Pharmaceuticals NEU.AX rise as much as
26.2% to A$14.690 - their highest since May 23
** NEU last up 17.9% - set for best day since March 15, if
gains hold
** Co expands Acadia Pharmaceuticals' ACAD.O exclusive
licence for its trofinetide drug in North America to worldwide
** NEU's trofinetide drug DAYBUE is approved by U.S. FDA to
treat genetic brain disorders like Rett syndrome
** Under deal, NEU will receive $100 mln up-front, plus
potential milestone payments of up to $427 mln and royalties
** NEU top gainer on ASX All Ordinaries index .AORD
** As of last close, stock up 46.4% this year
(Reporting by Himanshi Akhand in Bengaluru)
((Himanshi.Akhand@thomsonreuters.com;))