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Lactones contribute significantly to the flavor of fruit, and of unfermented and fermented dairy products,  and are therefore used as flavors and fragrances.  Some examples are γ-decalactone (4-decanolide), which has a characteristic peach flavor;  δ-decalactone (5-decanolide), which has a creamy coconut/peach flavour; γ-dodecalactone (4-dodecanolide), which also has a coconut/fruity flavor,  a description which also fits γ-octalactone (4-octanolide),  although it also has a herbaceous character;  γ-nonalactone , which has an intense coconut flavor of this series, despite not occurring in coconut,  and γ-undecalactone .