40283-99-6 AIDS-127774 AIDS127774 NSC187498 S-(2-((2-((4-Chlorophenyl)thio)ethyl)amino)-2-iminoethyl) hydrogen thiosulfate Thiosulfuric acid (H2S2O3), {S-[2-[[2-[(4-chlorophenyl)thio]ethyl]amino]-2-iminoethyl]} ester