- Fluorine-containing five-membered ring compounds, and a liquid-crystaline medium containing them
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Fluorine-containing five-membered ring compounds of the formula I in which W is STR1 is a cyclohexane, cyclohexene or phenyl, Y1 is O or S, Y2 is (a) O, S, C=O or fluoroalkyl, Y3 is (a) N, CH or CF, Q is C=O, CHF, CF2
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