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A. The main chemical that makes the giant bloom of Amorphophallus titanum, also called the titan arum, so odoriferous when it first emerges has been identified by Japanese researchers as a sulfur compound called dimethyl trisulfide.

Dimethyl trisulfide is implicated in the notorious odor of boiled cabbage, emerging when all the more pleasant odors have been cooked away.

The reek's main ingredient, dimethyl trisulfide, is known for its high potency and is added to normally odorless natural gas to give it a distinctive smell.

The reek's main ingredient, dimethyl trisulfide, is known for its high potency and is added to normally odorless natural gas to give it a distinctive smell.

Roasting releases a range of chemical compounds including 3-methylbutanoic acid, which on its own has a sweaty rancid odour, and dimethyl trisulfide, the smell of over-cooked cabbage.