Patent ID: 7091225

Claim:
A compound of formula (I) and pharmaceutically acceptable salts, solvates and hydrolysable esters thereof wherein X is O or S; X 1 is O or S; Y is S or O; R 1 and R 2 are independently H, methyl, or halogen; R 4 and R 5 are independently H or C 1-3 alkyl or R 4 and R 5 may, together with the carbon atom to which they are bonded, form a 3–5 membered cycloalkyl ring; R 6 and R 7 are independently H, C 1-3 alkyl, or allyl; each R 3 is independently halogen, C 1-6 straight or branched alkyl, or CF 3 ; and y is 0, 1, 2, 3, 4, or 5.