The invention is directed towards novel amino acid based compounds, which may be isotopically enriched, and methods of use of such compounds for characterizing one or more molecules of a sample by mass spectrometry, the method comprising: (a) reacting the one or more molecules with the compound; and (b) characterizing the one or more molecules by mass spectrometry.

In one aspect, the invention relates to compounds having the formula XII: ##STR00001##
where R.sup.a, R.sup.b, R.sup.2, R.sup.7, and X are as defined in the specification, or a pharmaceutically acceptable salt thereof. The compounds described herein are prodrugs of compounds having neprilysin inhibition activity. In another aspect, the invention relates to pharmaceutical compositions comprising these compounds; methods of using these compounds; and processes and intermediates for preparing these compounds.

In one aspect, the invention relates to compounds having the formula XII: ##STR00001##
where R.sup.a, R.sup.b, R.sup.2, R.sup.7, and X are as defined in the specification, or a pharmaceutically acceptable salt thereof. The compounds described herein are prodrugs of compounds having neprilysin inhibition activity. In another aspect, the invention relates to pharmaceutical compositions comprising these compounds; methods of using these compounds; and processes and intermediates for preparing these compounds.

The present application relates to novel, chiral 2,5-disubstituted cyclopentanecarboxylic acid derivatives, to a method for their preparation, to their use on their own or in combinations for the treatment and/or prevention of diseases, and to their use for producing medicaments for the treatment and/or prevention of diseases, in particular for the treatment and/or prevention of diseases of the respiratory tracts, the lung and the cardiovascular system.

The present application relates to novel, chiral 2,5-disubstituted cyclopentanecarboxylic acid derivatives, to a method for their preparation, to their use on their own or in combinations for the treatment and/or prevention of diseases, and to their use for producing medicaments for the treatment and/or prevention of diseases, in particular for the treatment and/or prevention of diseases of the respiratory tracts, the lung and the cardiovascular system.

The present application relates to novel 2,5-disubstituted cyclopentanecarboxylic acid derivatives, to processes for preparation thereof, to the use thereof alone or in combinations for treatment and/or prevention of diseases and to the use thereof for production of medicaments for treatment and/or prevention of diseases, especially for treatment and/or prevention of respiratory, pulmonary and cardiovascular disorders.

The present invention provides a method for treating a disease, disorder or condition associated with GPR139 using compounds of formula 1:

##STR00001##

which are agonists of GPR139, certain compounds encompassed by formula 1, pharmaceutical compositions thereof, processes for making the compounds, and intermediates thereof.

Described herein are selective HSD17B13 inhibitors and pharmaceutical compositions comprising said inhibitors. The subject compounds and compositions are useful for the treatment of liver disease, metabolic disease, or cardiovascular disease, such as NAFLD or NASH, or drug induced liver injury (DILI).

Described herein are selective HSD17B13 inhibitors and pharmaceutical compositions comprising said inhibitors. The subject compounds and compositions are useful for the treatment of liver disease, metabolic disease, or cardiovascular disease, such as NAFLD or NASH, or drug induced liver injury (DILI).

The present invention provides a method for treating a disease, disorder or condition associated with GPR139 using compounds of formula 1: ##STR00001##
which are agonists of GPR139, certain compounds encompassed by formula 1, pharmaceutical compositions thereof, processes for making the compounds, and intermediates thereof.