Fig. 2.

Fig. 2. The different skeleton types of plant diterpenoids and the corresponding compounds. Acyclic and monocyclic diterpenoids (cyan), bicyclic diterpenoids (blue), tricyclic diterpenoids (yellow), tetracyclic diterpenoids (pink), and macrocyclic diterpenoids(green).

© J. Microbiol. Biotechnol.