Review Question - QID 108159

A 32-year-old woman presents to her primary care physician with complaints of fatigue, periodic fevers, and weight loss for 2-3 weeks. A chest radiograph is performed that shows mediastinal lymphadenopathy, which is biopsied and found to be Hodgkin's lymphoma. She undergoes standard chemotherapy and external beam radiation therapy and is disease-free at six months. Shortly thereafter, she develops subacute shortness of breath; a CT scan of her chest is obtained (Figure A). Which of the following is the mechanism of the medication involved in the patient's presentation?