Biotechnology US biotech firm Spectrum Pharmaceuticals (Nasdaq: SPPI) said late Friday that it has again extended tender offer to purchase all of the outstanding shares of common stock of Allos Therapeutics (Nasdaq: ALTH; The Pharma Letter April 10) for $1.82 per share in cash (around $206 million in total), plus one contingent value right, which entitles Allos stockholders to an additional payment of $0.11 per share in cash if certain European regulatory approval and commercialization milestones for lymphoma drug Folotyn (pralatrexate injection), a folate analog metabolic inhibitor, are achieved. 9 July 2012