In this task, you are given a sentence. You are expected to recognize the name of any form of chemical substances. Although there might be several correct answers, you need to write one of them.
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Question: Penicillin-binding proteins and role of amdinocillin in causing bacterial cell death.

Answer: amdinocillin

Question: The effects of the phosphodiesterase type 5 inhibitor vardenafil on cognitive performance in healthy adults: a behavioral- electroencephalography study.

Answer: vardenafil

Question: The presence of D-fagomine in the human diet from buckwheat-based foodstuffs.

Answer:
D-fagomine