The molecule is also published in: https://doi.org/10.1007/BF02898308, Asmer, et al. (1988) Microbial production, structure elucidation, and bioconversion of sophorose lipids. JAOCS, 65: 1460-1466. It is a sophorolipid and a lactone.
[(1S,3R,4S,5S,6R,8R,17Z,28S,29R,31R,32R)-29-(acetyloxymethyl)-4,5,31,32-tetrahydroxy-10-methyl-26-oxo-2,7,9,27,30-pentaoxatricyclo[26.2.2.03,8]dotriacont-17-en-6-yl]methyl acetate