Isoamyl Isovalerate

Symrise: Sweet, like chocolate and cognac, as well as slightly fruity

Frutarom: Fresh, fruity, ripe, sweet, tropical
Suggested uses: banana, dairy products, grape, hard fruits, kiwi, mango, pear, soft fruits, tomato, tropical fruits

Moellhausen: Sweet, fruity (banana and apple note)

Pell Wall Perfumes: Sweet fruity green ripe apple jammy tropical
Arctander gives an interesting description of this material “peculiar fruity odor reminiscent of ripe apples, or more like the overwhelmingly choking odor of apples stored in a warehouse, almost a ‘fermented’ apple odor.”