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. 2019 Feb 27;9:2988. doi: 10.1038/s41598-019-39548-w

Figure 2.

Figure 2

Mass spectra (left) and UV spectra (right) of each identified peak in Fig. 1. The 663.2233 and 663.2205 m/z ions were observed to be the major abundant ion under peaks 2 and 3, with these peaks exhibiting a λmax of 440 nm and 416 nm respectively. The 380 nm peak (1) demonstrates a mass and absorbance spectra consistent with 1.