CAS 22684-91-9 appears in our catalog under these names: Doxepin N-Oxide (Mixture of Z and E Isomers), Doxepin Impurity 5, Doxepin N-Oxide. Offered by: Chemat Brand, Hubei YoungXin, TRC, Biosynth. Available pack sizes: on request, 10mg, 25mg, 50mg, 100mg, 200mg.