Patent ID: 7226915

Claim:
A compound of the formula: wherein, R1 is selected from the group consisting of lower alkyl, aryl lower alkyl, acetyl, aryl lower alkoxy lower alkyl and mono- or di-hydroxy substituted lower alkyl; R2 is selected from the group consisting of hydrogen, lower alkyl, aryl lower alkyl, acetyl, mono- or di-hydroxy substituted lower alkyl and aryl lower alkoxy lower alkyl; Ra is selected from the group consisting of hydrogen, aryl lower alkyl, lower alkyl, lower alkoxy, mono- or di-hydroxy substituted lower alkyl and R 10 is selected from hydrogen and Rb, Rc, Rd, Re and Rf are individually selected from the group consisting of hydrogen, perfluro-lower alkyl, halogen, lower alkyl substituted aryl lower alkyl, lower alkoxy, aryl lower alkoxy and R 11 is selected from hydrogen, lower alkyl and aryl; p is an integer from 0 to 1; and x and y are individually integers from 0 to 4, or a pharmaceutically acceptable salt thereof.