prov:value
| - group optionally substituted with one or more lower alkyl, lower alkoxy, hydroxyl or trifluoromethyl groups or a halogen atom and Hal is a halogen atom, to yield a compound of formula (I/f): ##STR13## in which R1, X, A, n, p, R'2 and R'4 have the as above, the isomers of which are separated, where appropriate, and which is purified if necessary by a technique selected from crystallization and/o
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