Chemically Talking, this molecule is "halfway" 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 2:3 consequently the "Sesqui" part inside the molecule's identify.   It may also functi