Putylone (also known as β-keto-1,3-benzodioxolyl-N-propyldioxybutanamine, bk-PBDB, and N-propylbutylone) is a stimulant and empathogen compound detected in 2023, around the time of a ban on the related compound eutylone.

The specific legal status of putylone has not yet been addressed by any agency or government.

Putylone is likely considered illegal in jurisdictions where similar analogues or psychoactive substances bans are in place, such as in the US, UK, and Ireland.