Patent ID: 8022069

Claim:
A compound of the formula or its pharmaceutically acceptable salt, in which R is C 2-8 -alkenyl, C 2-8 -alkynyl, C 0-8 -alkyl-carbonyl-optionally N-mono-C 1-8 -alkylated amino-C 1-8 -alkyl, C 3-8 -cycloalkyl-C 0-8 -alkyl, C 1-8 -alkyl-sulfonyl-C 1-8 -alkyl, optionally N-mono- or N,N-di-C 1-8 -alkylated carbamoyl-C 0-8 -alkyl, optionally O—C 1-8 -alkylated carboxyl-C 0-8 -alkyl, optionally N and/or N′ mono-, di- or tri-C 1-8 -alkylated ureido-C 1-8 -alkyl, heterocyclylcarbonyl-C 0-8 -alkyl or heterocyclyl-C 0-8 -alkyl; each of said radicals may be substituted by 1-4 substituents independently selected from C 1-8 -alkoxy, C 1-8 -alkoxy-C 1-8 -alkoxy, C 1-8 -alkyl, cyano, halogen, hydroxyl, oxo, trifluoromethoxy and trifluoromethyl.