Patent ID: 7442791

Claim:
A compound of formula I wherein U is O or a lone pair; R 1 is lower-alkyl, hydroxy-lower-alkyl, cycloalkyl or lower-alkyl-NH—C(O)—O-lower-alkyl; R 2 and R 3 are bonded to each other to form a ring together with the N—(CH 2 ) k —N group to which they are attached and —R 2 —R 3 — is (CH 2 ) 3 ; R 4 is lower-alkyl; R 5 is substituted or unsubstituted pyrimidine; W is a single bond; R 6 is hydrogen or lower-alkyl; V is a single bond, lower-alkylene, or lower-alkylene-oxy; k 2; m is 0, 1, 2, or 3, wherein k+m is not more than 5; and pharmaceutically acceptable salts thereof.