Didehydro Atovaquone

Didehydro Atovaquone is a fully conjugated hydroxynaphthoquinone derivative characterized by a 2-chloro-3-(4-nitrophenyl)-1,4-naphthoquinone core, featuring a fully oxidized quinone moiety and a para-nitrophenyl substituent. Its structure lacks the 1,4-dihydroxy substitution of the parent drug, replacing it with a fully conjugated 1,4-quinone system, while retaining a chloromethyl group at the naphthoquinone ring. This compound arises as a synthetic byproduct during atovaquone oxidation processes, resulting from over-oxidation of the hydroxyl groups. Serves as an HPLC reference standard for atovaquone impurity profiling in pharmaceutical quality control.