4.2.3.34 Biosynthesis of secondary metabolites - 4.2.3.34 diterpene phytoalexins precursors biosynthesis - 4.2.3.34 diterpene phytoalexins precursors biosynthesis diterpene phytoalexins precursors biosynthesis 4.2.3.34 Diterpenoid biosynthesis -