instruction:
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.
question:
Maqui berry (Aristotelia chilensis) and the constituent delphinidin glycoside inhibit photoreceptor cell death induced by visible light.
answer:
delphinidin glycoside


question:
Transdermal selegiline for the treatment of major depressive disorder.
answer:
selegiline


question:
Correlations between serotonin level and single-cell firing in the rat's nucleus raphe magnus.
answer:

serotonin