Patent ID: 7208494

Claim:
A compound of formula (I): wherein R 1 is hydrogen, alkyl, cycloalkyl, halogen, alkoxy, cycloalkoxy, alkoxyalkyl, cycloalkoxyalkyl, cycloalkylalkoxyalkyl, cycloalkylalkoxy, hydroxyalkyl, R 8 —O—N═(R 6 )C—, alkylsulfanyl or alkyl substituted with halogen; R 2 is alkyl, cycloalkyl, alkoxy, cycloalkoxy, cycloalkylalkoxy, halogen, hydroxy, hydroxyalkyl, alkoxyalkyl, cycloalkoxyalkyl, cycloalkylalkoxyalkyl, cycloalkylalkoxy, alkoxyalkoxy, cycloalkylalkoxyalkyl, hydroxyalkoxy, alkyl-SO 2 — or aralkoxyalkyl; R 3 is hydrogen, alkyl, cycloalkyl, hydroxyalkyl, alkoxyalkyl, cycloalkoxyalkyl or R 7 —O—N═CH—; R 4 is hydrogen or alkyl; R 5 is alkyl; R 6 is hydrogen or alkyl; R 7 is hydrogen, alkyl or cycloalkyl; R 8 is hydrogen, alkyl or cycloalkyl; or a pharmaceutically acceptable salt or ester thereof.