Patent ID: 7576207

Claim:
A compound of formula I: wherein: W is alkylene; Z is alkoxy, —C(═O)—R 2 , —NR 3 —C(═O)—R 4 , or —NR 3 S(═O) m alkyl; each R 1 is independently carboxy, hydroxy, alkoxy, halo, aminocarbonyl, N-alkylaminocarbonyl, or N,N-dialkylaminocarbonyl; R 2 is —NR 5 R 6 or alkoxy; R 3 and R a are each independently H or alkyl; R 4 is alkyl or —NR 5 R 6 ; R 5 and R 6 are each independently H or alkyl, or R 5 and R 6 taken together with the nitrogen atom to which they are connected form a 3- to 8-membered heterocycloalkyl ring in which 1 or 2 of the heterocycloalkyl ring carbon atoms independently may each be optionally replaced by —O—, —S—, —N(R 7 )—, —N(R 8 )—C(═O)—, or —C(═O)—N(R 9 )—; R 7 , R 8 , and R 9 are each independently H or alkyl; X is —CH 2 — or —O—; A and B are each H, or taken together with the carbon atoms through which they are connected form a double bond; and t is 0, 1 or 2; or a pharmaceutically acceptable salt thereof.