[Studies on chemical constituents in root of Phlomis medicinalis I].

OBJECTIVE: To study the chemical constituents in root of Phlomis medicinalis. METHOD: The compounds were isolated and repeatedly purified on macroporous resin, silica gel column chromatography, TLC and Prep-HPLC and the structures were elucidated by physico-chemical properties and NMR spectra. RESULT: Eight compounds were obtained and elucidated as 5-Hydroxy-7-methoxy-4, 6-dimethylphthalide (1), 4-hydroxymethyl-2-furaldehyde (2) and six iridoid glucosides: 6-O-acetyl-shanzhiside methyl ester (3), 8-O-acetyl-shanzhiside methyl ester (4), shanzhiside methyl ester (5), sesamoside (6), phloyoside II (7) and dehydropentstemoside (8). CONCLUSION: All the compounds were isolated from the plant for the first time and 1 and 3 were obtained from the plants of Phlomis for the first time.

[Infrared spectroscopy technology, one of the faster and more convenient methods to detect the stability of stored Niuxi].

OBJECTIVE: To detect the change of Niuxi in reserve and establish one easier method of evaluating the quality change of Niuxi. METHODS: Infrared spectroscopy and compare software were used to distinguish the different Niuxi, and simulation testing were used to observe calefactive stability. RESULTS: There were obvious difference between transmutative and normal Niuxi, and Niuxi had evident change when the temperature above 140 degrees C in the simulation testing. CONCLUSION: Infrared spectroscopy can be used to evaluae the quality stability of Niuxi. It is one tried method to provide the establishment of reserve and torrefaction conditions.