Mugwort is primarily known for its thujone. Thujone is a ketone and a monoterpene that is found in various species of Artemisia plants. Thujone is known for its strong aroma and is believed to have potential medicinal properties. It has been traditionally used in herbal medicine for its antispasmodic, digestive, and diuretic effects. However, it is important to note that thujone can be toxic in high doses and prolonged use, and caution should be exercised when using Mugwort or any products containing thujone.