Riligustilide is a nonsteroidal phytoprogestogen that is found in Ligusticum chuanxiong.

[1][2] It is a very weak agonist of the progesterone receptor (EC50 ≈ 81 μM).

[1] Another compound in the plant, 3,8-dihydrodiligustilide, is also a phytoprogestogen, but is almost 1,000-fold more potent in comparison (EC50 = 90 nM).

[1] This drug article relating to the genito-urinary system is a stub.

You can help Wikipedia by expanding it.