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[Studies on chemical constituents of two plants from Costus]
Chun-feng Qiao1, Qiu-wen Li, Hui Dong
1Department of Pharmacognosy, China Pharmaceutical University, Nanjing 210038, Jiangsu, China.
Objective:
To study the chemical constituents of Costus speciosus and C. tonkinensis (Zingiberaceae) distributed in Yunnan province.
Method:
Chromatography and spectral analyses were used to isolate the constituents and elucidate their structure.
Result:
Six compounds were isolated from the rhizome of C. speciosus and elucidated as diosgenin(1), prosapogenin B of dioscin(2), diosgenone(3), cycloartanol(4), 25-en-cycloartenol(5) and octacosanoic acid(6). Four compounds were isolated from the rhizome of Costus tonkinensis and elucidated as tetracosanoic acid(7), succinic acid(8), beta-sitosterol(9) and daucosterin(10).
Conclusion:
Compounds of 3-6 were obtained from C. speciosus for the first time and compounds of 7-10 were obtained from C. tonkinensis for the first time too.