Patent ID: 7754722

Claim:
A compound according to Formula I: wherein R 1 is H; R 2 is selected from aryl, heteroaryl, 3-8-membered cycloalkyl and heterocycloalkyl; R 3 is selected from C 1 -C 16 -alkyl, C 2 -C 16 -alkenyl, C 2 -C 16 -alkynyl, monocyclic aryl, monocyclic heteroaryl, 3-8-membered monocyclic cycloalkyl, monocyclic heterocycloalkyl, acyl, C 1 -C 16 -alkyl aryl, C 1 -C 16 -alkyl heteroaryl, C 2 -C 16 -alkenyl aryl, C 2 -C 16 -alkenyl heteroaryl, C 2 -C 16 -alkynyl aryl, C 2 -C 16 -alkynyl heteroaryl, C 1 -C 16 -alkyl cycloalkyl, C 1 -C 16 -alkyl heterocycloalkyl, C 2 -C 16 -alkenyl cycloalkyl, C 2 -C 16 -alkenyl heterocycloalkyl, C 2 -C 16 -alkynyl cycloalkyl, C 2 -C 16 -alkynyl heterocycloalkyl, alkoxycarbonyl, aminocarbonyl, C 1 -C 16 -alkyl carboxy, C 1 -C 16 -alkyl acyl, aryl acyl, heteroaryl acyl, C 3 -C 8 -(hetero)cycloalkyl acyl, C 1 -C 16 -alkyl acyloxy, C 1 -C 16 -alkyl alkoxy, C 1 -C 16 -alkyl alkoxycarbonyl, aminocarbonyl, C 1 -C 16 -alkyl acylamino, acylamino, C 1 -C 16 -alkyl sulfinyl, C 1 -C 16 -alkyl sulfanyl, C 1 -C 16 -alkyl ureido, C 1 -C 16 -alkyl carbamate, C 1 -C 16 -alkyl amino, C 1 -C 16 -alkyl ammonium; R 4 is selected from C 1 -C 12 -alkyl, C 2 -C 12 -alkenyl, C 2 -C 12 -alkynyl, aryl, heteroaryl, 3-8-membered cycloalkyl, heterocycloalkyl, and amino; and pharmaceutically acceptable salts thereof.