| http://www.w3.org/ns/prov#value | - h as a methyl or ethyl radical in particular, or an oxyethylene chain of the formula ##STR2## in which R3 and R4 independently are a hydrogen atom or a methyl radical and n is an integer greater than or equal to 1, or a salt thereof, for preparing a pharmaceutical, dermatological or cosmetic composition for the prevention or treatment of allergic manifestations such as skin allergy or bronchial as
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