** Shares of Osteopore OSX.AX rise as much as 128.6% to A$0.016, hitting their highest level since July 29
** Stock marks its biggest intraday pct gain since April 9
** Medicine firm signs distribution agreement with Majeton to commercialise its dental, orthodontic products in China, Hong Kong
** Says contract valued at over 12 million yuan ($1.72 million)
** Stock has gained more than 40% so far this week, up over 140% YTD
($1 = 6.9660 Chinese yuan)
(Reporting by Rajasik Mukherjee in Bengaluru)
((Rajasik.Mukherjee@thomsonreuters.com))