Patent ID: 8685978

Claim:
A compound of Formula (I): wherein: R 1 and R 2 are each independently H, alkoxycarbonyl, or aralkoxycarbonyl; R 3 is alkyl; R 4 is H, hydroxy, alkyl, or alkoxy; and R 5 is â€”C(â•O)R 6 , wherein R 6 is: (a) selected from the group consisting of â€”CH 2 NHC(CH 3 ) 3 , â€”CH(NH 2 )CH(CH 3 )CH 2 CH 3 , â€”CH(NH 2 )CH(CH 3 ) 2 , â€”CH(CH 2 C 6 H 5 )NHC(â•O)CH 2 NH 2 , â€”CH 2 CH 2 NHC(â•O)C 6 H 5 , and â€”CH 2 CH 2 NHC(â•O)CH 2 C 6 H 5 ; or (b) selected from the group consisting of heteroaryl, substituted heteroaryl, 2-substituted phenyl, 4-halo-substituted phenyl, â€”CH 2 R 7 , and â€”C(R 8 ) 2 ; wherein R 7 is selected from the group consisting of aralkyl, substituted aralkyl, heteroaryl, substituted heteroaryl, and substituted phenyl, wherein said substituted phenyl is selected from the group consisting of fluoro-substituted phenyl, alkyl-substituted phenyl, 2-substituted phenyl, 3-mono-substituted phenyl, 2,3-di-substituted phenyl, and di-substituted phenyl wherein two phenyl carbons are together substituted with an alkylene; and each R 8 is independently aryl or substituted aryl; and wherein said heteroaryl and said substituted heteroaryl are selected from the group consisting of pyridyl, pyrimidinyl, pyridazinyl, oxazolyl, furanyl, triazolyl, triazinyl, benzofuranyl, pyrrolyl, imidazoyl, pyrazole, thiazolyl, quinolinyl, isoquinolinyl, benzoxazolyl, and benzothiazolyl, or a pharmaceutically acceptable salt thereof.