| Compound | Description |
|---|
| violaxanthin | a carotene epoxide that is precursor to capsanthin; one of 3 xanthophylls involved in evolution of plastids of green plants (oxygen evolution); 3 (violaxanthin, zeaxanthin & antheraxanthin) participate in series of photo-induced interconversions known as ''violaxanthin cycle''; structure; cleavage of 9-cis-epoxycarotenoids (violaxanthin) to xanthoxin, catalyzed by 9-cis-epoxycarotenoid dioxygenase, is the key regulatory step of ABSCISIC ACID biosynthesis |
| neoxanthin | one of the main carotenoids in chloroplasts of higher plants and algae; RN given refers to (9'-cis)-isomer |
| xanthoxin | RN given refers to cpd with unspecified isomeric designation; cleavage of 9-cis-epoxycarotenoids (violaxanthin) to xanthoxin, catalyzed by 9-cis-epoxycarotenoid dioxygenase, is the key regulatory step of ABSCISIC ACID biosynthesis; structure |
| Abscisic Acid, (+,-)-Isomer | |