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. 2021 Jun 4;12:678668. doi: 10.3389/fmicb.2021.678668

FIGURE 4.

FIGURE 4

FTIR spectra of standard sophorolipid, 1,4″-sophorolactone 6′,6″-diacetate (A) and biosurfactant produced by the strain CIG-6AT (B).