Synonyms: Flunisolide [INN];Flunisolide;Aerobid;Aerobid M;Aerospan;Aerospan HFA;Bronalide;Flunisolida;Flunisolida [INN-Spanish];Flunisolide HFA;Flunisolidum;Flunisolidum [INN-Latin];Lunis;Nasalide;Nasarel;Nisolid;RS 3999;Rhinalar;Soluzione;Synaclyn;Syntaris;UNII-78M02AA8KF;6alpha-Fluoro-11beta,16alpha,17,21-tetrahydroxypregna-1,4-diene-3,20-dione cyclic 16, 17-acetal with acetone;Pregna-1,4-diene-3,20-dione, 6-alpha-fluoro-11-beta,16-alpha,17,21-tetrahydroxy-, cyclic 16,17-acetal with acetone;Pregna-1,4-diene-3,20-dione, 6-fluoro-11,21-dihydroxy-16,17-((1-methylethylidene)bis(oxy))-, (6alpha,11beta,16alpha)-;(4aR,4bS,5S,6aS,6bS,9aR,10aS,10bS,12S)-12-fluoro-5-hydroxy-6b-(hydroxyacetyl)-4a,6a,8,8-tetramethyl-4a,4b,5,6,6a,6b,9a,10,10a,10b,11,12-dodecahydro-2H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-2-one;(6bS,9aR,12S)-12-fluoro-5-hydroxy-6b-(hydroxyacetyl)-4a,6a,8,8-tetramethyl-4a,4b,5,6,6a,6b,9a,10,10a,10b,11,12-dodecahydro-2H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-2-one;(4aR,5S,6aS,6bS,9aR,10aS,10bS,12S)-12-fluoro-5-hydroxy-6b-(hydroxyacetyl)-4a,6a,8,8-tetramethyl-4a,4b,5,6,6a,6b,9a,10,10a,10b,11,12-dodecahydro-2H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-2-one;(4aR,4bS,5S,6aS,6bS,9aR,10aS,10bS,12S)-12-fluoro-5-hydroxy-6b-(hydroxyacetyl)-4a,6a,8,8-tetramethyl-4a,4b,5,6,6a,6b,9a,10,10a,10b,11,12-dodecahydro-2H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-2-one hydrate (2:1)