Cantharidin methylimide
Methylcantharidimide is an orally bioavailable derivative of the terpenoid cantharidin, which is a natural toxin extracted from blister beetles, with potential antineoplastic activity. Although the exact mechanism of action through which methylcantharidimide exerts its effect has yet to be fully elucidated, this agent, upon oral administration, may exert a direct tumor cell killing effect in susceptible tumor cells.