Particular compounds disclosed therein are (−)-(1R,4S,5S,6S)-4-amino-2-sulfonylbicyclo[3.1.0]-hexane-4,6-dicarboxylic acid (also known as LY-404039)or a salt or a solvate thereof, and (1R,4S,5S,6S)-4-[[(2S)-2-amino-4-(methylthio)-1-oxobutyl]amino]-2-thiabicyclo[3.1.0]...
hydrochloric acid, hydrobromic acid, sulfuric acid, phosphoric acid, nitric acid, and the like), and salts formed with organic acids such as amino acid, acetic acid, oxalic acid, tartaric acid, succinic acid, malic acid, ascorbic acid, benzoic acid, tannic acid, palmoic ...