Substituted piperidinophenones CompoundStructure Substituted cathinones α-Piperidinopropiophenone (α-PIPPP) α-Piperidinobutiophenone (α-PIPBP) α-Piperidinohexiophenone (α-PIPHP) 4-Fluoro-α-piperidinopentiophenone (4-FPIPVP) 3,4-Trimethylene-α-piperidinopentiophenone (3,4-Pr-PIPVP)