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: The role of extranuclear signaling actions of progesterone receptor in mediating progesterone regulation of gene expression and the cell cycle.

A: progesterone
****
Q: Phytoestrogen genistein protects against endothelial barrier dysfunction in vascular endothelial cells through PKA-mediated suppression of RhoA signaling.

A: genistein
****
Q: Interaction of silymarin flavonolignans with organic anion-transporting polypeptides.

A:
flavonolignans
****