Abstract: Mono, di and tri-esters of 1,8-dihydroxy-10-phenyl-9-anthrone or -9-anthranol have the formula ##STR1## wherein p is 0 or 1,(a) when p=0, t=1 and R.sub.2 represents hydrogen or --COR.sub.3,(b) when p=1, t=0 and R.sub.1 and R.sub.2 each independently represent hydrogen or --COR.sub.3,R.sub.3 represents linear or branched alkyl having 1-17 carbon atoms, cycloalkyl, phenyl or phenyl substituted by lower alkyl, lower alkoxy, halogen, a nitro function, --CF.sub.3 or a hydroxyl function, and mixtures of said esters. These esters are prepared by reacting 1,8-dihydroxy-10-phenyl-9-anthrone with an activated form of an acid. The esters are useful in human or veterinary medicine and in cosmetic compositions.

Abstract: Compounds of the formula ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and represent a straight-chain or branched alkyl group of 1 to 15 carbon atoms, a cycloalkyl group of 3 to 6 carbon atoms, a 2-furyl, 3-furyl, 3-pyridyl, 4-pyridyl or 2-thienyl group or an aromatic group of the formula ##STR2## wherein X, Y and Z are the same or different and represent hydrogen, alkyl of 1 to 3 carbon atoms, trifluoromethyl, alkoxy with 1 to 4 carbon atoms, halogen, nitro or hydroxy groups are useful as pharmaceutical, veterinary and cosmetic agents.

Abstract: 1,8-dihydroxy-9-anthrone derivatives, substituted in the 10-position by an unsaturated radical, are described which have utility as ingredients in human and veterinary pharmaceutical and cosmetic preparations and which are compounds of the structural formula ##STR1## wherein R.sub.1 represents a hydrogen atom or a --CO.sub.2 R'.sub.2 radical,R.sub.2 and R'.sub.2 identical or different, represent a hydrogen atom, a linear or branched chain alkyl radical having 1 to 6 carbon atoms, a cycloalkyl radical having 4 to 6 carbon atoms or a benzyl radical,or R.sub.1 and R.sub.2 taken together form a radical --CO--, andn is 0 or 1,with the proviso that when n is 0 and R.sub.1 is --CO.sub.2 R'.sub.2, R.sub.2 and R'.sub.2 do not simultaneously represent the radical CH.sub.3,and the isomers of the compounds of formula (I) and mixtures thereof.

Abstract: An anti-acne composition comprises in a carrier suitable for topical application to the skin an active compound having the formula ##STR1## wherein R.sub.1 is linear or branched alkyl having 1-12 carbon atoms, mono- or polyhydroxyalkyl having 2-5 carbon atoms, alkenyl having 3-6 carbon atoms, cycloalkyl having 3-6 carbon atoms, or a radical of the formula ##STR2## wherein n is 0 or 1, m is 1, 2 or 3, R.sub.2 is hydrogen or lower alkyl having 1-3 carbon atoms and R.sub.3 represents hydrogen, alkyl having 1-4 carbon atoms, nitro, --CF.sub.3 or halogen. The acid salts of these active compounds can also be used.