Other plant compounds
Olives are rich in many plant compounds, particularly antioxidants, including:

Oleuropein. This is the most abundant antioxidant in fresh, unripe olives. It is linked to many health benefits.

Hydroxytyrosol. During olive ripening, oleuropein is broken down into hydroxytyrosol. It is also a powerful antioxidant.

Tyrosol. Most prevalent in olive oil, this antioxidant may have anti-cancer effects.