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Fluocinolone fluocinolone Base 6α-Fluorotriamcinolone fluocinolone N-1 intermediate Fluocinolone Acetonide EP Impurity C Fluocinolone Acetonide EP Impurity C (Fluocinolone) 6α,9-Difluoro-11β,16α,17,21-tetrahydroxypregna-1,4-diene-3,20-dione (6α,11β,16α)-6,9-Difluoro-11,16,17,21-tetrahydroxypregna-1,4-dien e-3,20-dione (6α,11β,16α)-6,9-Difluoro-11,16,17,21-tetrahydroxypregna-1,4-dien e-3,20-dione Pregna-1,4-diene-3,20-dione, 6,9-difluoro-11,16,17,21-tetrahydroxy-, (6α,11β,16α)- Fluocinolone Acetonide Impurity 3 (Fluocinolone Acetonide EP Impurity C）(Fluocinolone) fluocinolone base(pregna-1,4-diene-3,20-dione,6a,9-difluora-11b,16a,17,21-tetrahydroxy 6-alpha,9-alpha-difluoro-11-beta,16-alpha,17-alpha,21-tetrahydroxypregna-1,4-diene-3,20-dione (6S,8S,9R,10S,11S,13S,14S,16R,17S)-6,9-difluoro-17-glycoloyl-11,16,17-trihydroxy-10,13-dimethyl-6,7,8,11,12,14,15,16-octahydrocyclopenta[a]phenanthren-3-one (6S,8S,9R,10S,11S,13S,14S,16R,17S)-6,9-difluoro-11,16,17-trihydroxy-17-(2-hydroxyacetyl)-10,13-dimethyl-6,7,8,11,12,14,15,16-octahydrocyclopenta[a]phenanthren-3-one (6S,8S,9R,10S,11S,13S,14S,16R,17S)-6,9-difluoro-11,16,17-trihydroxy-17-(2-hydroxyethanoyl)-10,13-dimethyl-6,7,8,11,12,14,15,16-octahydrocyclopenta[a]phenanthren-3-one