3,8-Dihydrodiligustilide is a nonsteroidal phytoprogestogen that is found in Ligusticum chuanxiong.^[1][2] It is a potent agonist of the progesterone receptor (EC₅₀ = 90 nM).^[1] Another compound in the plant, riligustilide, is also a phytoprogestogen, but is almost 1,000-fold less potent and is very weak in comparison (EC₅₀ ≈ 81 μM).^[1]

• Kaempferol
• Tanaproget