Embryology of Tussilago farfara (Asteraceae:Senecioneae) Flavonoids and phenolic acid derivatives from Flos Farfarae Comparative Analysis on the Metabolic Compositions of Flower Bud and Rachis of Tussilago farfara Based on GC-MS Fingerprinting Approach Monitoring of Chemical Components Changes during Tussilago farfara L. Development using NMR-based Metabolomics Observation on the Process of Flower Bud Differentiation in Medicinal Plant Tussilago farfara L. Phytochemical and pharmacological research progress in Tussilago farfara. Studies on chemical constituents in the buds of Tussilago farfara Studies of the Spasm-relieving Effect of Glycyrrhiza uralensis Fisch.—Aster tataricus L. F. Puivis Mixture on Trachea in Guinea Pigs