Use of tricyclic derivatives of 1,4-dihydro-1,4-dioxo-1H-naphthalene, novel compounds obtained and their application in theraphy

A method for the treatment of illness associated with an alteration in venous function and/or inflammatory edems which comprises administering a sufficient amount of a tricyclic derivative or a pharmaceutically-acceptable salt thereof having the general formula:

• in which:
• A is either a sulfur or an oxygen atom or an R3N radical where R3 is a hydrogen atom, a C1-C5 alkyl radical, a substituted or unsubstituted aromatic ring, or a substituted or unsubstituted heteroaromatic ring;
• R1 is either a C1-C5 alkyl radical,
• or an RaNH radical where R4 is a hydrogen atom, a C1-C5 alkyl radical, a substituted or unsubstituted aromatic ring, or a substituted or unsubstituted heteroaromatic ring,
• an aromatic ring that may or may not be substituted by one or more acceptor or donor groups, or a heteroaromatic ring having one or more heteroatoms, which may or may not be substituted by acceptor or donor groups;
• R2 is a hydrogen atom, halogen atom, a C1-C5 alkyl radical, an oxygen atom that may or may not be substituted by a C1-C5 alkyl radical, or an NR5R5′ radical where R5 and RR′ are, independently of each other, a hydrogen atom, an oxygen atom or monovalent C1-C5 organic radical, for treatment of illness connected with an alteration in venous function and/or inflammatory edema.