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]: Cereblon is a direct protein target for immunomodulatory and antiproliferative activities of lenalidomide and pomalidomide.
[A]: lenalidomide

[Q]: Inhibition of EGF/EGFR activation with naphtho[1,2-b]furan-4,5-dione blocks migration and invasion of MDA-MB-231 cells.
[A]: naphtho[1,2-b]furan-4,5-dione

[Q]: The (R)-omeprazole hydroxylation index reflects CYP2C19 activity in healthy Japanese volunteers.
[A]:
(R)-omeprazole