👉 Quercitin is a type of compound found in plants, particularly in fruits and vegetables. It is composed of two linked sugar molecules, which are linked together by a bond called a tricarboxylic acid (TCA) cycle. Quercitin is known for its antioxidant properties and has been shown to have anti-inflammatory effects. Quercitnins can be synthesized from quercetin, the main constituent in thyme leaves. The synthesis process involves several steps: 1.