L'oreal

Didier S Leger

Henri Sebag

Michel Philippe

Jean L Leveque

Bernard Jacquet

Michel Hocquaux

Andre Rougier

Didier Dupuis

Quaternary ammonium retinoate, characterized in that it corresponds to the formula: ##STR1## in which: X-- denotes either an all-trans-retinoate of formula (I): ##STR2## or a 13-cis= retinoate of formula: ##STR3## (i) R.sub.1, R.sub.2 and R.sub.3, which may be identical or different, denote a saturated C.sub.1 -C.sub.4 linear alkyl group capable of bearing one or more hydroxyl group(s) at the end of the chain or in the chain;

Quaternary ammonium retinoates, their use in cosmetics and in

Topical compositions intended for skin treatment and based on salicylic acid derivatives. The invention relates to topical compositions with a keratolytic and/or comedolytic effect, containing, in a carrier which is suitable for application to skin, at least one compound corresponding to the formula I: ##STR1## in which R denotes a linear, branched or cyclized saturated aliphatic chain containing from 3 to 11 carbon atoms, an unsaturated chain containing from 3 to 17 carbon atoms and containing one or more conjugated or unconjugated double bonds, these various substituents being optionally substituted by one or more halogen atoms, by one or more trifluoromethyl groups, by one or more hydroxyl groups in free form or esterified with an acid containing from 1 to 6 carbon atoms or by a carbonyl group which is free or esterified with a lower alcohol containing from 1 to 6 carbon atoms,

Topical compositions intended for skin treatment containing salicylic

Linear bi- or tri-enic fatty esters of erythromycin A have the formula ##STR1## wherein one of R and R' represents a linear bi- or tri-enic C.sub.18 acyl radical having an all cis (Z) stereochemical configuration and the other of R and R' represents hydrogen.

Bi- or tri-enic fatty esters of erythromycin A; pharmaceutical and

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Paris, France

Didier S Leger