Chemically speaking, this molecule is "midway" among 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 a ratio of two:3 therefore the "Sesqui" section inside the molecule's name. I also like that this is within