prov:value
| - l, C1 -C4 -alkoxy or NH-C1 -C4 -acyl and where at least one of R1 to R4 is other than hydrogen, and in whichR5, R6, R7 and R8 independently of one another are selected from hydrogen, C1 -C4 -alkyl, halogen or C1 -C4 -alkoxy,in which a substituted phenol of the formula ##STR11## in which R1, R2, R3 and R4 have the meaning indicated above, is catalytically hydrogenated in the presence of a catalyst
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