Isosafrole is an organic compound that is used in the fragrance industry.

Structurally, the molecule is related to allylbenzene, a type of aromatic organic chemical.

Isosafrole is a precursor to the important fragrance piperonal.

[3] It can also be converted via the intermediate compound MDP2P into the psychoactive drug MDMA ('ecstasy').

As such it requires permits to purchase or sell in any significant quantity in the US.