DNP

c1(O)c([N+](=O)=[O-])cc([N+](=O)=[O-])cc1

Inhibits ETC by shuttling protons through the inner membrane of the mitochondrion. Specifically, an $\mathrm{O}{}^{-}$ version of the phenol group attaches to an $\mathrm{H}{}^{+}$ and forms DNP, which then diffuses through the membrane and then disassociates