what are some pharmaceutical companies?
['Pfizer — $51.75 billion.', 'Roche — $50 billion.', 'Novartis — $47.45 billion.', 'Merck — $46.84 billion.', 'GlaxoSmithKline — $43.54 billion.', 'Johnson & Johnson — $42.1 billion.', 'AbbVie — $33.27 billion.', 'Sanofi — $27.77 billion.']