Patent ID: 7935689

Claim:
A compound of the formula: wherein n is 1; m is 0, 1, 2, 3, 4, 5, 6, 7 or 8; q is 0 or 1; t is 0; R 1 is alkyl having from 1 to 3 carbon atoms; R 2 is hydrogen, halo, alkyl having from 1 to 3 carbon atoms, or alkoxy having from 1 to 3 carbon atoms; R 3 and R 4 together are alkyl having two or three carbon atoms; or R 3 and R 4 are the same as each other and each is methyl or ethyl; R 5 is hydrogen or alkyl having from one to six carbon atoms; A is phenyl, unsubstituted or substituted by 1 or 2 groups selected from: halo, hydroxy, alkyl having 1 or 2 carbon atoms, perfluoromethyl, alkoxy having 1 or 2 carbon atoms, and perfluoromethoxy; or cycloalkyl having from 3 to 6 ring carbon atoms wherein the cycloalkyl is unsubstituted or one or two ring carbons are independently mono-substituted by methyl or ethyl; or a 5 or 6 membered heteroaromatic ring having 1 or 2 ring heteroatoms selected from N, S and O and the heteroaromatic ring is covalently bound to the remainder of the compound of formula I by a ring carbon; or a pharmaceutically acceptable salt of the compound.