| Member | Definition | Role |
|---|
| dehydrocostus lactone | An organic heterotricyclic compound and guaianolide sesquiterpene lactone that is acrylic acid which is substituted at position 2 by a 4-hydroxy-3,8-bis(methylene)decahydoazulen-5-yl group and in which the hydroxy group and the carboxy group have undergone formal condensation to afford the corresponding gamma-lactone. | dehydrocostus lactone |
| englerin a | A guaiane sesquiterpenoid that is isolated from the bark of Phyllanthus engleri, a plant native to Tanzania and Zimbabwe. It acts as a potent and specific inhibitor of renal cancer cell growth. | englerin A |
| guaiol | | guaiol |
| zaluzanin C | A sesquiterpene lactone that is decahydroazuleno[4,5-b]furan-2(3H)-one substituted by methylidene groups at positions 3, 6 and 9 and a hydroxy group at position 8. | zaluzanin C |