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. 2017 May 30;16:95. doi: 10.1186/s12934-017-0711-z

Fig. 9.

Fig. 9

The least energy structures of the sophorolipid (SL) homologues detected during LC–MS analyses of the SL produced by Rhodotorula babjevae YS3 and SL standard, 1,4′′-sophorolactone 6′,6′′-diacetate. Structures were drawn in ChemDraw Ultra 12.0 (LS lactonic SL, AS acidic SL, Ac acetyl group)