Chemically speaking, this molecule is "midway" involving Sorbitan Oleate and Sorbitan Trioleate, this means that it's 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 that's why the "Sesqui" component in the molecule's name. I also like this is in a tub