"Wa Butler Co." . "http://www.spectrumpharm.com" . "Biovail Pharmaceuticals" . "http://www.merckle.de" . "Merckle GmbH" . "http://www.biovail.com" . "Duramed pharmaceuticals inc sub barr laboratories inc" . "Mckesson Corp." . "http://www.mckesson.com" . . "Spectrum Pharmaceuticals" .