Patent ID: 8278458

Claim:
A compound represented by Structural Formula (I): wherein: R 1 is —H or an acyl group; R 2 is —[(CH 2 ) n —O] x —[(CH 2 ) n —O] y —R′; R 3 , R 4 and R 5 are each —H; R 6 and R 7 are each —H; R 8 is —H or an alkyl group; R 9 is —OR 12 or —N(OH)R 13 ; R 10 is —H or an alkyl group; R 11 is —H, an alkyl group or an acyl group; R 12 is —H or an alkyl group; R 13 is an alkyl group; R 14 is an alkyl group; R′ is an alkyl group; m is an integer from 1 to 8; each n is independently an integer from 1 to 8; x is an integer from 1 to 8; y is an integer from 0 to 8; Z is —C(O)R 14 , or or a salt thereof.