👉 Paraquinone is a chemical compound with the formula C20H18O. It is a plant-derived pigment found in the leaves of some plants, such as the chrysalis in the butterfly stage, and in algae. Paraquinones are known for their ability to inhibit the synthesis of reactive oxygen species (ROS) during oxidative stress reactions. Paraquinone can be extracted from various sources, including the leaves and stems of various plants, as well as the skin cells of some