| http://www.w3.org/ns/prov#value | - A compound of formula I as recited in claim 2 wherein: R1 is a (C1-C4)-alkyl or O???(C1-C4)-alkyl; R2 is H; R3 is (C1-C4)-alkyl; W is CH, if o=1; X is CH2???O???CH2; n is 1; R4 is H or F; R5 is H or F; R6 is H or F; R5 and R6 including the carbon atom to which they are attached comprise a ???C3-C8)-cycloalkane-1,2-diyl; R7 is selected from the group consisting of H, F, (C1-C6)-alkyl, phenyl and NH
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