Steroidal saponins from f lowers of Hosta plantaginea and their antitumor activities Pharmacognostical Identification of "Guijiu (鬼臼)" in Shosoin of Japan Anti-inflammatory fraction and chemical constituents of Hosta plantaginea Studies on anti-inflammatory fraction of Hosta plantaginea Bacteriostasis of Volatile Compounds from Six Perennial Root Flower Plants