In this task, you will be given sentences in which your task is to recognize the name of the drug or medicine. Drugs are substances that change a person's mental or physical state. They can affect how your brain works, how you feel and behave, your understanding, and your senses. Although there might be several correct answers, you need to write one of them.

Input: Consider Input: Ovarian endometrioid adenocarcinoma arising from an endometriotic cyst in a postmenopausal woman under tamoxifen therapy for breast cancer: a case report.

Output: tamoxifen


Input: Consider Input: Two patients had ampicillin-associated seizures.

Output: ampicillin


Input: Consider Input: CONCLUSION: This case illustrates a potential link between dermatologic and ocular 5-FU toxicities.


Output: 5-FU