Please note that "Biosynthetic" only means what the manf. infers.
People might be led to think this oil would be composed of say 80% or more of bio-derived (Group V) component(s) because it is designated as 'Bio,' but notice that it also contains Group II and Group III base oil components as well.
Why would it contain lessor base oil Groups? Because they are needed to impart certain characteristics to the final formulation that the bio-synthetic component cannot provide alone.
My Point? People need to realize that ALL oils these days are actually "BLENDs" of various base oil types of various viscosities--as I have stated numerous times.
I think component 4 is an ester-based anti-oxidant.
I think component 5 is obviously a Molybdenum DithioCarbamate FM or MoDTC.