Patent ID: 7897608

Claim:
A compound according to Formula (I) below: wherein: X represents bond or CH 2 ; R 1 represents a keto group or (H,H); R 2 represents OH or OMe; R 3 represents H, OH or OMe; R 4 and R 5 each independently represent H or OH; R 6 represents —R 7 , —C(O)R 7 , —POR 19 R 20 , or Y—R 15 ; R 7 represents —(CR 8 R 9 ) m (CR 10 R 11 ) p CR 12 R 13 R 14 ; R 8 and R 9 each independently represent C1-C4 alkyl, C2-C4 alkenyl or C2-C4 alkynyl, any of which groups may optionally be substituted with —PO(OH) 2 , —CF 2 PO(OH) 2 , —OH, —COOH or —NH 2 ; or R 8 and R 9 each independently represent H, trifluoromethyl or F; R 10 , R 11 , R 12 , R 13 and R 14 each independently represent C1-C4 alkyl, C2-C4 alkenyl or C2-C4 alkynyl, any of which groups may optionally be substituted with —PO(OH) 2 , —CF 2 PO(OH) 2 , —OH, —COOH or —NH 2 ; or R 10 , R 11 , R 12 , R 13 and R 14 may be independently selected from H, —(CR 8 R 9 ) q NH 2 , —(CR 8 R 9 ) q OH, CF 3 , F, COOH; or R 10 and R 11 or R 12 and R 13 or R 13 and R 14 may be taken together with the carbon to which they are joined to form a C3-C6 cycloalkyl or a 3- to 6-membered heteroalkyl ring that contains one or more heteroatoms selected from N, O and S and that is optionally, substituted with up to 5 —(CR 8 R 9 ) q OH, —(CR 8 R 9 ) q NH 2 or COOH groups; Y═bond, —C(O)—O—; —(CH 2 ) 2 —O—C(O)—O—; R 15 represents R 16 are each independently H or OH; R 17 is independently selected from H, OH and NH 2 ; R 18 is independently selected from H, —CH 3 , —CH 2 OH and —COOH; provided however that no more than 2 groups selected from R 16 , R 17 and R 18 represent H or CH 3 ; R 19 and R 20 each independently represent H or C1-C4 alkyl or R 19 and R 20 together represent ═CH 2 ; m, p and q each independently represent an integer between 0-4; provided however that the R 7 moiety does not contain more than 12 carbon atoms and does contain at least one functional group selected from —PO(OH) 2 , —CF 2 PO(OH) 2 , —COOH, OH or NH 2 ; or a pharmaceutically acceptable salt thereof.