What active ingredient is found in Sambucus mexicana used for colds?

Rutin is the active ingredient found in Sambucus mexicana that is used for treating colds. Rutin is a bioflavonoid known for its antioxidant properties and its potential to decrease inflammation, which can be particularly beneficial during respiratory infections. It supports the immune system and helps improve circulation, making it a valuable substance in herbal remedies for colds and flu.

The other substances mentioned do not have the same properties or applications related to cold treatments. Coumarin is a compound with anticoagulant properties but is not primarily associated with cold relief. Taxol and Vincristine are both chemotherapy agents used in cancer treatment, and they do not have significance in treating viral infections such as colds. Therefore, Rutin stands out as the compound that is relevant to the context of colds when derived from Sambucus mexicana.