Chemically speaking, this molecule is "midway" among Sorbitan Oleate and Sorbitan Trioleate, indicating that it is also an attachment of sorbitan (a dehydrated sorbitol (sugar) molecule) with the unsaturated fatty acid Oleic Acid, but within a ratio of 2:3 as a result the "Sesqui" part within the molecule's identify. It is also a potent antioxidan