Surface and biological activity of sophorolipid molecules produced by Wickerhamiella domercqiae var. sophorolipid CGMCC 1576

► Sophorolipids (SLs) were produced by Wickerhamiella domercqiae. ► Six SL molecules with different structures were prepared and identified. ► Surface and biological activity of different SL molecules were compared. ► The different SL molecules showed distinct surface and biological activity. ► Some explanations were given for the influence of structures on activities.