Synthetics
Rhubafuran (givaudan) smells like a fresh, green rhubarb with citrus notes.
Luebke, William tgsc, (1989): Green rhubarb grapefruit citrus herbal eucalyptus woody
Givaudan: Rhubarb, green, fresh, citrus
Rhubafuran has an intense tangy rhubarb character, with a green eucalyptus heart very suitable in citrus accords. it is especially good for air fresheners.
Moellhausen: Fresh aromatic, floral, herbal, strongly reminiscent of rhubarb