2H-Naphth[2'',1'':4,5]indeno[1,2-d][1,3]dioxole Pregn-4-ene-3,20-dione Deriv. is a by-product from the synthesis of 4-Fluorotriamcinolone Acetonide (F598640) an analog of Fluocinolone Acetonide (F455800); a glucocorticoid and anti-inflammatory agent.