Composition and method for treating or preventing musculoskeletal fibrosis

pharmaceutical composition for use in the treatment and / or use in preventing fibrosis of losmusculos skeletal in a subject in need thereof, the composition comprising an effective cantidadfarmaceuticamente of a compound in combination with a farmaceuticamenteaceptable carrier, the compound with a formula : ** ** Formula where: n or 1 or 2 is; R1 is a member in the group consisting of hydrogen, halogen, nitro, benzo, lower alquiloalcoxi; R2 is a member of the group consisting of hydroxy, acetoxy and lower alkoxy; and R3 is a member of the group consisting of hydrogen and lower alkenoxy-carbonyl farmaceuticamenteaceptables and salts thereof.