A C20 terpene.
| Member | Definition | Role |
|---|
| abietane | | abietane |
| axerophthene | A diterpene that is cyclohexene substituted by a (1Z,3E,5E,7E)-3,7-dimethylnona-1,3,5,7-tetraen-1-yl group at position 2 and by methyl groups at positions 1,3 and 3. It is the parent hydrocarbon on which Vitamin A and other retinoids are based. | axerophthene |
| cembrane | A 14-membered macrocyclic diterpene carrying an isopropyl group at C-1 and three symmetrically disposed methyl groups at C-4, -8 and -12. | cembrane |
| cembrene a | A fourteen-membered macrocyclic diterpene consisting of 1,5,9-trimethyl-12-(prop-1-en-2-yl)cyclotetradecane having three endocyclic double bonds located at positions 1, 5 and 9. | (R)-cembrene A |
| halimane | A diterpene that consists of decalin bearing four methyl substituents at positions 1, 2, 5 and 5 as well as a 3-methylpentyl substituent at position 1. | halimane |
| labdane | | labdane |
| phorbols | | tigliane |
| phytane | | phytane |
| pimarane | | pimarane |
| rhodojaponin iii | | Rhodojaponin III |
| taxane | | taxane |