Chemically speaking, this molecule is "midway" involving Sorbitan Oleate and Sorbitan Trioleate, that means that it is also an attachment of sorbitan (a dehydrated sorbitol (sugar) molecule) with the unsaturated fatty acid Oleic Acid, but inside of a ratio of two:3 consequently the "Sesqui" component in the molecule's title. Lots of reports say it