Megastigmatrienone, tobacco flavour found in rum and armagnac is found in fresh distillate, possibly from carotenoid decomposition and it is also found in toasted oak wood.

Armagnac, single distillation, medium heavy toast on black oak barrels. Aged 6 months to 2 years in new oak and then transferred to older depleted oak barrels. Producers aerating their brandy while it ages.