Patent ID: 7319103

Claim:
A compound of the formula: where X is O, S or CH 2 ; Y is N; Z is N; R and R 1 are independently: (C1-C8) straight or branched alkyl optionally substituted with halogens or heteroatom groups, or (C3-C8) cycloalkyl substituted with halogens or heteroatom groups; or R and R 1 taken together form a cycloalkyl group optionally substituted with: (C1-C8) straight or branched alkyl; (C3-C8) cycloalkyl; halogens; or heteroatom groups; where one or more of the methylene groups may be replaced by O, N or S; R 3 and R 4 taken together form: R 5 and R 6 taken together form —(CH 2 ) 3-5 — and R 7 is selected from the group consisting of H, halogen, alkyl, aryl, O-alkyl, S-alkyl, NH-alkyl, N(alkyl) 2 , acyl and N-acyl, or a pharmaceutically acceptable salt thereof.