Trisulfide Acetyl Ethoxy is an intermediate in the synthesis of (6α,11β,16α,17α)-(6'α,11'β,16'α,17'α)-17,17'-(Trithiodicarbonyl)bis[6,9-difluoro-11-hydroxy-16-methyl-17-(1-oxopropoxy)-androsta-1,4-dien-3-one (T886430), which is a Dimerized impurity of Fluticasone propionate (F599500), a antiallergic, anti-asthmatic and anti-inflammatory agent.