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Effect of Long-term Storage on Seed Quality of Masson Pine Studies on dynamic variation of six isoflavones contents in rhizomes of Belamcanda chinensis Determination of 4-methoxysalicylaldehyde in Cortex Periplocae from various habitats and at different collecting times Sexual reproduction of Physocarpus amurensis HPLC determination of caffeic acid in Herba Lycopi