Chemically Talking, this molecule is "midway" involving 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 hence the "Sesqui" aspect while in the molecule's name. We do a Best of INCIDecoder email a