Institut National De La Sante Et De La Recherche Medicale

Dietrich Averbeck

Emile R Bisagni

Louis Dubertret

Silvano Nocentini

Jocelyne Blais

Maria N Schwencke

Paul Vigny

Francois Zajdela

Jacqueline Morin

Dora Papadopoulo

Ethel Moustacchi

Dubertret Louis

Jacqueline Moron

Pyrido (3,4', 4,5) furo (3,2-g) coumarins or pyrido (3,4-h) psoralens having formula I ##STR1## wherein R is a hydrogen radical or a lower alkyl group having from 1 to 4 carbon atoms and R' is a methyl group or a methoxy group. These compounds are photobiologically active and are useful or medicinals and pharmaceutical compositions in association with ultraviolet radiation for treating skin diseases and as cosmetic compositions for skin pigmentation.

(3,4';4,5)-Pyrido (3,2-g)-furo coumarins or (3,4-h) pyrido psoralens

Monofunctional psoralen derivatives having the general formula ##STR1## wherein R represents a hydrogen atom, a lower alkyl group having from 1 to 4 atoms, preferably a methyl radical, or a lower alkoxy radical having from 1 to 4 carbon atoms, preferably a methoxy radical are described. The derivatives are photobiologically active and are useful in photochemical therapy and in cosmetics.

(3,4-c)-Pyrido psoralens, process of preparation, application in

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L'Hay Les Roses, France

Dietrich Averbeck