Chemically Talking, this molecule is "halfway" between Sorbitan Oleate and Sorbitan Trioleate, meaning that it's 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" element in the molecule's title. When Farmacy suggests "makeup melt