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. 2021 Dec 13;13(12):2139. doi: 10.3390/pharmaceutics13122139

Figure 4.

Figure 4

Opiorphin detection in GlicoPro. (a) High-performance liquid chromatography chromatogram of GlicoPro; (b) exact mass of compound 1, identified as opiorphin; (c) exact mass of compound 2, identified as lactame derivative of opiorphin in position 1.