Patent ID: 6919334

Claim:
A compound of Formula I: wherein X—Y is —N═C(R 4 )—, —NH—C(O)—, —NH—C(O)—C(O)—, —NH—C(S)—or —NH—S(O) 2 —; Z is O, S or NR 5 , in which R 5 is hydrogen or alkyl of 1 to 6 carbon atoms; R 1 , R 2 and R 3 are, independently, hydrogen, hydroxy, halo, cyano, carboxamido, carboalkoxy of two to six carbon atoms, trifluoromethyl, alkyl of 1 to 6 carbon atoms, alkoxy of 1 to 6 carbon atoms, alkanoyl of 2 to 6 carbon atoms, alkanoyloxy of 2 to 6 carbon atoms, amino, mono- or di-alkylamino in which each alkyl group has 1 to 6 carbon atoms, alkanamido of 2 to 6 carbon atoms, alkanesulfonyl of 1 to 6 carbon atoms or alkanesulfonamido of 1 to 6 carbon atoms; R 4 is hydrogen, halo, amino, mono- or di-alkylamino in which each alkyl group has 1 to 6 carbon atoms or alkyl of 1 to 6 carbon atoms; the dotted line represents an optional double bond; and n is 0, 1 or 2; or a phannaceutically acceptable salt thereof.