** Shares of Australia's Neuren Pharmaceuticals Ltd NEU.AX
rise as much as 23.1% to A$13.9, their highest since July 27
** Brain disorder drug maker says quarterly sales of co's
drug licensed to U.S.-based Acadia Pharmaceuticals ACAD.O
exceeded expectations
** Says higher sales will lead to significant royalty
revenue and potential sales milestone payments for co
** Adds if Arcadia meets its guidance, then co would receive
royalties of A$26 mln ($16.72 mln) to A$28 mln for FY23
** Stock posts its biggest intraday percentage gain since
July 14
** 616,641 shares change hands, compared with the 30-day
average volume of 446,559
** Stock is the second biggest percentage gainer on the
benchmark S&P/ASX 200 index .AXJO
** Stock up 42% YTD as of last close
($1 = 1.5555 Australian dollars)
(Reporting by Aaditya Govind Rao in Bengaluru)
((Aaditya.govindrao@thomsonreuters.com;))