Patent ID: 8895624

Claim:
A compound of formula (I) wherein: R 1 represents hydrogen, halogen, cyano, trifluoromethyl, nitro, —OR a , SR a , SOR a , —SO 2 R a , —SO 2 NR a R b , —NR a R b , —NR a COR b , —NR a CO 2 R b , —COR a , —CO 2 R a , —CONR a R b , or a hydrocarbon group comprising a straight chain, branched or cyclic group each containing up to 18 carbon atoms, or a heterocyclic group containing up to 18 carbon atoms and at least one heteroatom; R 2 represents, independently at each occurrence, hydrogen, halogen, cyano, trifluoromethyl, nitro, —OR a , SR a , SOR a , —SO 2 R a , —SO 2 NR a R b , —NR a R b , —NR a COR b , —NR a CO 2 Rb, —COR a , —CO 2 R a , —CONR a R b , or a hydrocarbon group comprising a straight chain, branched or cyclic group each containing up to 18 carbon atoms, or a heterocyclic group containing up to 18 carbon atoms and at least one heteroatom; R 3 represents a hydrocarbon group comprising a straight chained, branched or cyclic group each containing up to 18 carbon atoms, and being substituted by at least one moiety including a —CO 2 R a substituent; wherein R a and R b independently represent, at each occurrence, hydrogen, or a hydrocarbon group comprising a straight chained, branched or cyclic group each containing up to 18 carbon atoms, or a heterocyclic group containing up to 18 carbon atoms and at least one heteroatom; and n is 0, 1, 2, 3 or 4; or a pharmaceutically acceptable solvate salt or prodrug thereof; for use in the treatment of osteoporosis and/or osteopenia.