Violaxanthin
Violaxanthin is a xanthophyll pigment with an orange color found in a variety of plants. Violaxanthin is the product of the  epoxidation of zeaxanthin where the oxygen atoms are from reactive oxygen species (ROS).  Such ROS's arise when a plant is subject to solar radiation so intense that the light cannot all be absorbed by the chlorophyl.

Food coloring
Violaxanthin is used as a food coloring under the E number E161e and INS number 161e. The coloring is not approved for use in food in the EU or the United States, but is allowed in Australia and New Zealand.

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Carotenoids
Epoxides
Food colorings
Tetraterpenes