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Phytochemical investigation of 90% ethanol extracts of the roots of Aristolochia fangchi yielded two new aristolochic acid derivatives named Aristolochic Acid F and Aristolochic Acid G, together with three known compounds. Their structures were elucidated by spectral analysis. The cytotoxicity of the isolated compounds was also determined.

Two New Aristolochic Acid Derivatives from the Roots of Aristolochia fangchi and Their Cytotoxicities