Get C11 H12 F2 O5 S = 8mr = (3r)-4,4-difluoro-3-((4-methoxyphenyl) sulfonyl)butanoic acid Get C11 H19 F3 O S = tfc = 1,1,1-trifluoro-3-(octylthio)acetone Get C8 H5 F3 O2 S = ttf = 4,4,4-trifluoro-1-thien-2-ylbutane-1,3-dione; 2-thenoyltrifluoroacetone