Chemically Talking, 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 a very ratio of two:3 for this reason the "Sesqui" part while in the molecule's title. Your personal detai