CAS 1621284-00-1 appears in our catalog under these names: Acitretin Impurity 4, Acitretin Impurity 11, 1,1'-((1E,3E,5E,7E,9E)-3,8-Dimethyl-1,3,5,7,9-decapentaene-1,10-diyl)bis(4-methoxy-2,3,6-trimethylbenzene. Offered by: Chemat Brand, TRC. Available pack sizes: on request, 25mg.