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. 2013 Jan 25;18(2):1582–1601. doi: 10.3390/molecules18021582

Figure 4.

Figure 4

Figure 4

Representative HPLC chromatograms: (A) the purified six authentic compounds; (B) aqueous extract, crude methanol extract and its different solvent partition fractions (1 mg/mL) of flower part of BPR. AE: aqueous extract, ME: methanol extract, HM: n-hexane fraction, EM: ethyl acetate fraction, BM: n-butanol fraction, AM: the remaining aqueous fraction. The peak number and its chemical structure are referred to Figure 2. Characteristic UV spectra, negative- ESI and APCI mass spectra are referred to Figure 3A,B, respectively.