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Identification of toddalolactone in the active fraction Z. nitidum var. tomentosum extract. (A) Analytical HPLC chromatogram of #27 with detection wavelength of 254 nm. (B) Chromatogram of toddalolactone standard (left) and Peak 4 of #27 of the extract (right) under the same chromatographic analysis condition. Inset: structure of toddalolactone.
