Patent ID: 7244751

Claim:
A compound of formula I: or its stereoisomer, enantiomer, diastereomer, or a pharmaceutically acceptable salt; wherein A is a phenyl or pyridyl, optionally substituted with 1 to 4 substituents selected from the group consisting of a halogen atom, an alkyl group having 1 to 4 carbons, and a perfluoralkyl group having 1 to 4 carbons; B is-phenyl; Z is a bond; Y is a moiety having —CO— which is linear and in which the distances between the centroid of ring B (W1), the centroid of ring A (W2) and an oxygen atom as a hydrogen bond acceptor in the moiety Y (W3) are: W1-W2=about 6.0 to about 12.0 Å, W1-W3=about 3.0 to about 6.0 Å, and W2−W3=about 4.0 to about 8.0 Å, respectively; R 1 and R 2 are independently hydrogen or an alkyl having 1 to 4 carbons; R 3 is hydrogen; R 4 is an amino group; and One of X 1 , X 2 , X 3 , or X 4 is halogen or an alkyl group having 1 to 4 carbons while the others of X 1 , X 2 , X 3 , or X 4 independently are hydrogen.