BUZZ-Aquinox Pharmaceuticals Inc: Plans $75 mln stock offering
** Drug developer's shares down 7.5 pct at $14.53
** Company says on Tuesday it plans to offer $75 mln of common stock
** Company had 10.7 mln shares outstanding as of Aug. 5
** Aquinox had cash, cash equivalents, short- and long-term investments of $29 mln as of June 30
** Up to Tuesday's close, stock had more than doubled in value this year
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