1. A 54-year-old man with emphysema presents to his physician with a blood pressure of 157/101 mm Hg. Over the next several months the physician prescribes angiotensin converting enzyme inhibitors, diuretics, and calcium channel blockers, but the patient has to discontinue each agent because of undesirable side effects. The physician then decides to prescribe a beta antagonist. Which of the following beta antagonists would be most appropriate for this particular patient?