Chemically Talking, this molecule is "midway" amongst Sorbitan Oleate and Sorbitan Trioleate, indicating 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 that's why the "Sesqui" section in the molecule's title. When in search of clean beauty so