134826-40-7 2-((3-Chloro-9-acridinyl)thio)-1-(4-nitrophenyl)ethanone 3-Chloro-9-(p-nitrobenzoylmethylthio)acridine BRN 4887663 Ethanone, 2-((3-chloro-9-acridinyl)thio)-1-(4-nitrophenyl)-