Fig. 6

Lupeol biosynthesis and degradation (common biosynthesis pathway for any pentacyclic triterpene) (compound structures source: https://pubchem.ncbi.nlm.nih.gov)
Lupeol biosynthesis and degradation (common biosynthesis pathway for any pentacyclic triterpene) (compound structures source: https://pubchem.ncbi.nlm.nih.gov)