Dipropenyl sulfide is a constituent of Garlic oil, onion oil[1].
ChEBI: Di-1-propenyl sulfide is an organic sulfide that is hydrogen sulfide substituted by two prop-1-en-1-yl groups. It is a volatile constituent found in garlic and onions. It has a role as a flavouring agent and a volatile oil component. It is an organic sulfide and an olefinic compound.
[1] Perchellet JP, et al. Effects of garlic and onion oils on glutathione peroxidase activity, the ratio of reduced/oxidized glutathione and ornithine decarboxylase induction in isolated mouse epidermal cells treated with tumor promoters. Cancer Biochem Biophys. 1986 Oct;8(4):299-312. PMID:3802049