Before-the-Bell: Biocryst Shares Higher  NEW YORK (Reuters) - Shares of Biocryst Pharmaceuticals  Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=BCRX.O target=/stocks/quickinfo/fullquote"&gt;BCRX.O&lt;/A&gt; rose on Tuesday after the company received  "orphan drug" status for an anti-cancer compound.