p. 3449 - 3454
(1993)8-Fluoro-9-[4-(4-fluoro-phenyl)-piperazin-1-yl]-2-methyl-1,6-dioxo-2,3-dihydro-1H,6H-1λ4-thia-3a-aza-phenalene-5-carboxylic acid ethyl ester
8-Fluoro-2-methyl-1,6-dioxo-9-[4-(2-trifluoromethyl-benzyl)-piperazin-1-yl]-2,3-dihydro-1H,6H-1λ4-thia-3a-aza-phenalene-5-carboxylic acid ethyl ester