Synthetics
(z)-6-nonenal smells like a combination of fresh melon, cucumber, and a hint of raw fish with a subtle pepino fruit sweetness.
Mosciano, Gerard P&F 20, No. 1, 31, (1995): Green cucumber and melon with a woody orris-type nuance
Luebke, William tgsc, (2003): Green cucumber melon cantaloupe honeydew waxy vegetable orris violet leaf
FCI SAS: Very diffusive melon like odor, slightly metallic
Synerzine: Powerful fresh citrus, cucumber, melon