Chemically speaking, this molecule is "midway" in between Sorbitan Oleate and Sorbitan Trioleate, which means that it is also an attachment of sorbitan (a dehydrated sorbitol (sugar) molecule) with the unsaturated fatty acid Oleic Acid, but in the ratio of 2:3 that's why the "Sesqui" element during the molecule's title. It's also a potent antioxid