Patent ID: 8258176

Claim:
Dithiolopyrrolone compounds (Formula I) or their pharmaceutical acceptable salts: Wherein, X is O, NR 4 or S; R 1 represents unsubstituted or optionally substituted following groups: C 4 -C 8 cycloalkyl, C 5 -C 10 aryl or three to ten-membered heterocyclic group having one to three heteroatoms independently selected from N, O or S; R 2 represents hydrogen or C 1 -C 10 alkyl; R 3 represents hydrogen, or unsubstituted or optionally substituted following groups: C 1 -C 10 alkyl, C 2 -C 10 alkenyl, C 2 -C 10 alkynyl, C 3 -C 10 cycloalkyl, C 1 -C 10 alkyl substituted by C 5 -C 10 aryl, C 5 -C 10 aryl, or three to ten-membered heterocyclic having one to three heteroatoms independently selected from N, O or S; R 4 represents hydrogen or C 1 -C 10 alkyl.