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Chromatograms showing mass spectra and retention times of cucurbitacin B (Cuc B − blue), cucurbitacin E (Cuc E – purple), and cucurbitacin I (Cuc I − pink) standards (A) and Cuc B, Cuc E, and Cuc I detection in leaf (B) and root samples (C,D). mAU = milli −absorbance unit.
