4'-Methoxy-α-pyrrolidinopropiophenone
4'-Methoxy-α-pyrrolidinopropiophenone (MOPPP) is a stimulant designer drug of the pyrrolidinophenone class. It has the potential to produce euphoria, an effect shared with other classical stimulants.
Source: Wikipedia — 4'-Methoxy-α-pyrrolidinopropiophenone (CC BY-SA 4.0)