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.

[Q]: Rat hepatic stellate cells become retinoid unresponsive during activation.
[A]: retinoid


[Q]: Interaction of silymarin flavonolignans with organic anion-transporting polypeptides.
[A]: flavonolignans


[Q]: Neuronal expression of glucosylceramide synthase in central nervous system regulates body weight and energy homeostasis.
[A]:
glucosylceramide