Patent ID: 6924270

Claim:
A compound represented by formula II wherein at least one of R 2′ , R 3′ or R 5′ is H, R 20 —(W) x —CO—, R 20 —(W) x —CS— or R 20 —(W) x —PO(OH)—; and wherein R 2′ , R 3′ or R 5′ is not H; wherein R 20 is alkyl, H, alkanoyl, cycloalkyl, aryl, heterocyclic, NR 21 R 22 , alkenyl, or alkynyl; or is alkyl, alkanoyl alkenyl or alkynyl substituted by halo, phenyl, cycloalkyl, NR 21 R 22 , hydroxy, alkoxy; or is aryl substituted by phenyl halo, CN, NO 2 , OH, R 28 , OR 28 , CF 3 , SH SR 21 , SOR 21 , SO 2 R 21 ; NR 21 R 22 CO 2 H, CO 2 − , OR 21 , O − M + or S − M + ; wherein M + is an alkali metal cation; or R 20 is —(CHR 21 ) e —(CH 2 ) f —CO—OR 22 , —(CHR 21 ) e —(CH 2 ) f —OR 22 , or —(CHR 21 ) e —(CH 2 ) f —NR 21 R 22 W is O, NR 28 or S; R 21 is H, alkyl, alkanoyl or aryl or is alkyl, alkanoyl or aryl substituted substituted by halo, phenyl, CN, NO 2 OH, CO 2 H or alkoxy; and R 22 is H, alkyl or aryl or is alkyl or aryl substituted by phenyl; halo, CN, NO 2 , OH, CO 2 H or alkoxy; or R 21 and R 22 taken together with N and one of CHR 21 , NR 21 , O, S, SO or SO 2 form a five-, six- or seven-membered ring; R 27 is H, OR 21 , NR 21 R 22 , R 20 —(W) x —CO—, R 20 —(W) x —CS—, (HO) 2 PO— or R 20 —(W) x —PO(OH)— or HO—SO 2 —; R 28 is H, alkanoyl, aryl, alkyl or alkyl substituted by OH, halo or NR 21 R 22 ; e=0 to 6, f=0 to 10, t=0 to 100; s=0 to 6000; r=1 to 5000; and x=0 or 1; or a pharmaceutically acceptable salt thereof.