title: Riligustilide
text: # Riligustilide
  
  Riligustilide is a nonsteroidal phytoprogestogen that is found in Ligusticum chuanxiong. It is a very weak agonist of the progesterone receptor $(EC_{50}$ ≈ 81 μM). Another compound in the plant, 3,8-dihydrodiligustilide, is also a phytoprogestogen, but is almost 1,000-fold more potent in comparison $(EC_{50}$ = 90 nM).
  
  