Patent ID: 7102002

Claim:
A compound of formula (I): or an enantiomer, diastereomer, or pharmaceutically acceptable salt, thereof, wherein X is —O—, —OCONH—, —S—, —SO— or —SO 2 —, or X is absent; R 1 is hydrogen, alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, aryl, substituted aryl, heterocyclo, substituted heterocyclo, aralkyl, substituted aralkyl, heterocycloalkyl or substituted heterocycloalkyl; R 2 is isopropyl; R 3 is wherein each R 4 is independently selected from hydrogen, halogen or alkyl; n is 0, 1 or 2; and R 5 is hydrogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, heterocyclyl or substituted heterocyclyl.