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.

Example Input: Delay of corneal wound healing in patients treated with colchicine.
Example Output: colchicine

Example Input: Reversible valproic acid-induced dementia: a case report.
Example Output: valproic acid

Example Input: Bowel perforation associated with intraperitoneal chromic phosphate instillation.
Example Output:
chromic phosphate