Chemically Talking, this molecule is "midway" between Sorbitan Oleate and Sorbitan Trioleate, meaning that it is also an attachment of sorbitan (a dehydrated sorbitol (sugar) molecule) with the unsaturated fatty acid Oleic Acid, but inside a ratio of 2:three for this reason the "Sesqui" portion during the molecule's title. The emollient plant oil