Chemically speaking, this molecule is "midway" amongst 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 within a ratio of two:3 as a result the "Sesqui" component inside the molecule's name. A very multi-practical helpe