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[Studies on the chemical constituents of Pseudotsuga sinensis]
Jin-hai Yi1, Guo-lin Zhang, Bo-gang Li
1Sichuan Institute of Chinese Materia Medica, Chengdu 610041, China.
Aim:
To study the chemical constituents of Pseudotsuga sinensis Dode (Pinaceae).
Methods:
To separate the constituents of P. sinensis by using various kinds of chromatography and identify their structures on the basis of spectral analysis.
Results:
Six compounds were isolated from P. sinensis. Their structures were established as 5,7,4'-trihydroxy-6-methylflavanone (poriol, I), 3,5,7,3',4'- pentahydroxyflavonone (quercetin, II), 5,7,3',5'-tetrahydroxy-6- methylflavanone (III), 5,7,3',5'-tetrahydroxyflavanone (IV), 3,5,7,3',5'-pentahydroxyflavanone (V) and 5-hydroxy-6-methylchromone-7-O-beta-D-glucopyranoside (VI) based on the analysis of spectral data of IR, UV, MS, 1D and 2D-NMR.
Conclusion:
Compounds III and VI are new compounds. All of six compounds were isolated from this plant for the first time.