结论：1%地蒽酚蜡棒是治疗寻常型银屑病安全、有效的药物。
CONCLUSION: 1 % dithranol stick is an effective and safe drug for treatment of psoriasis vulgaris.
大黄酚和大黄素甲醚是大黄中有功效的蒽醌类成份，由于两者结构相似，酸性与极性相近，往往难以分离。
Ahrysophanol and physcion are effective anthraquinones in rhubarb, but it is difficult to separate than other anthraquinones because of resemble structure and close characters.
目的从虎杖中提取并分离蒽醌类成分大黄酸、大黄素、大黄酚和大黄素甲醚等。
Objective To extract and separate the anthraquinone compounds, such as rhein, emodin, chrysophanol, physcion, etc. from Rhizoma Polygoni Cuspidati.
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