Abstract: An objective of the present invention is to provide a novel NDM (New Delhi metallo-?-lactamase) inhibitor that functions as a drug for restoring the antibacterial activity of ?-lactam antibiotics that have been inactivated as a result of decomposition by NDM.

Abstract: An objective of the present invention is to provide a novel NDM (New Delhi metallo-?-lactamase) inhibitor that functions as a drug for restoring the antibacterial activity of ?-lactam antibiotics that have been inactivated as a result of decomposition by NDM.

Abstract: The present invention provides an iminochlorin aspartic acid derivative represented by the following formula (I): ##STR1## Wherein Asp represents an aspartic acid residue, or a pharmaceutically acceptable salt thereof. The compound of the present invention is useful as a photosensitizer for photophysico-chemical diagnosis and therapy of cancer, because it has a high accumulability to cancerous cells, reactivity to external energy and a cancerous cell destroying effect which is effective even against cancers developing in deep site, while it is rapidly excreted from normal cells and therefore causes no damage thereto.

Abstract: (1R,5S,6S)-6-[(R)-1-hydroxyethyl]-1-methyl-2-[(1,2-diiminomethyl)-4-pyrazol idinyl-thio-carbapenem-3-carboxylic acid is provided as an intermediate, which is converted into (1R,5S,6S)-2-[(6,7-dihydro-5H-pyrazolo[1,2-a][1,2,4]triazolium-6-yl]thio-6 -[R-1-hydroxyethyl]-1-methyl-carbapenem-3-carboxylate. This compound is an antibacterial agent, which also may be in the form of the corresponding acid or pharmaceutically acceptable salt, in which case there is included an anionic group balancing the traizolinium positive charge. As such as anionic group may be mentioned, for example, the chloride, acatate or carbonate. As the salt may be mentioned the alkali metal salts, for example, sodium.

Abstract: Methods and compositions are provided for controlling or preventing a bacterial infection which are based upon (1R,5S,6S)-2-[(6,7-dihydro-5H-pyrazolo[1,2-a][1,2,4]triazolium-6-yl)]thio- 6-[R-1-hydroxyethyl]-1-methyl-carbapenem-3-carboxylate or a pharmaceutically acceptable salt thereof.

Abstract: (1R,5S,6S)-6-[(R)-1-hydroxyethyl]-1-methyl-2-[(1,2-diiminomethyl)-4-pyrazol idinyl]-thio-carbapenem-3-carboxylic acid is provided as an intermediate, which is converted into (1R,5S,6S)-2-[(6,7-dihydro-5H-pyrazolo[1,2-a][1,2,4]triazolium-6-yl)]thio- 6-[R-1-hydroxyethyl]-1-methyl-carbapenem-3-carboxylate. This compound is an antibacterial agent, which also may be in the form of the corresponding acid or pharmaceutically acceptable salt, in which case there is included an anionic group balancing the traizolinium positive charge. As such an anionic group may be mentioned, for example, the chloride, acatate or carbonate. As the salt may be mentioned the alkali metal salts, for example, sodium.

Abstract: (1R,5S,6S)-6-[(R)-1-hydroxyethyl]-1-methyl-2-[(1,2-diiminomethyl)-4-pyrazol idinyl]-thio-carbapenum-3-carboxylic acid is provided as an intermediate, which is converted into (1R,5S,6S)-2-[(6,7-dihydro-5H-pyrazolo[1,2-a][1,2,4]triazolium-6-yl)]thio- 6-[R-1-hydroxyethyl]-1-methyl-carbapenum-3-carboxylate. This compound is an antibacterial agent, which also may be in the form of the corresponding acid or pharmaceutically acceptable salt, in which case there is included an anionic group balancing the traizolinium positive charge. As such an anionic group may be mentioned, for example, the chloride, acatate or carbonate. As the salt may be mentioned the alkali metal salts, for example, sodium.