CAS 1261392-69-1 appears in our catalog under these names: Hydroxychloroquine Sulfate EP Impurity D-d5 (Chloroquine USP Related Compound D-d5, Desethyl Chloroquine-d5), Desethyl chloroquine-d5. Offered by: Chemat Brand, MedChemExpress. Available pack sizes: on request, 1mg, 5mg.