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. 2020 May 11;13(9):2200. doi: 10.3390/ma13092200

Figure 8.

Figure 8

ESI–MS/MS fragmentation experiment for the ion at m/z 729 of oligo(3HB-co-4HB)/30WF after 70 days of degradation in water (for 3-HB units R = CH3 and x = 1; for 4-HB units R = H and x = 2) (see Figure 7).