... d]imidazol-4-yl)pentanoic acid; 5-[(3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d] ... imidazol-4-yl]pentanoic acid; 5-[(3aR,4S,6aS)-2-oxohexahydro-1H-thieno[3,4-d] ... 4-d]imidazol-4-yl]pentanoate; 5-[(3aS,4S,6aS)-2-oxohexahydro-1H-thieno[3,4-d]imidazol ... -4-yl]pentanoate; 5-[(3aR,4S,6aS)-2-oxohexahydro-1H-thieno[3,4-d] ... imidazol-4-yl]pentanoate; 5-[(3aR,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d] ...