The present invention is directed to compounds of the formula (I) wherein all substituents are defined herein, as well as pharmaceutically acceptable compositions comprising compounds of the invention and methods of using said compositions in the treatment of various disorders.

##STR00001##

The present invention relates to an improved process for the preparation of Linezolid of Formula-I comprising reacting compound of Formula-II with compound of Formula-III in presence of metal base wherein, said metal base is prepared in situ in a single lot. The invention also relates to an isolated acetamide impurity of Formula-IV produced in the process for preparation of Linezolid, its purification and its use as a reference marker.

##STR00001##

The present invention relates to an improved process for the preparation of Linezolid of Formula-I comprising reacting compound of Formula-II with compound of Formula-III in presence of metal base wherein, said metal base is prepared in situ in a single lot. The invention also relates to an isolated acetamide impurity of Formula-IV produced in the process for preparation of Linezolid, its purification and its use as a reference marker.

##STR00001##

The present invention is directed to a monomer useful in preparing therapeutic compounds. The monomer includes one or more pharmacophores which potentially binds to a target molecule with a dissociation constant of less than 300 μM and a linker element connected to the pharmacophore. The linker element has a molecular weight less than 500 daltons, is connected, directly or indirectly through a connector, to the pharmacophore.

The present invention is directed to a monomer useful in preparing therapeutic compounds. The monomer includes one or more pharmacophores which potentially binds to a target molecule with a dissociation constant of less than 300 μM and a linker element connected to the pharmacophore. The linker element has a molecular weight less than 500 daltons, is connected, directly or indirectly through a connector, to the pharmacophore.

The present invention relates to methods for producing particles of metaxalone using dry milling processes as well as compositions comprising metaxalone, medicaments produced using metaxalone in particulate form and/or compositions, and to methods of treatment of an animal, including man, using a therapeutically effective amount of metaxalone administered by way of said medicaments.

The present invention relates to methods for producing particles of metaxalone using dry milling processes as well as compositions comprising metaxalone, medicaments produced using metaxalone in particulate form and/or compositions, and to methods of treatment of an animal, including man, using a therapeutically effective amount of metaxalone administered by way of said medicaments.

The present invention discloses compounds of Formula (I), or pharmaceutically acceptable salts, esters, or prodrugs thereof:

X-A-Y-L-R  (I)

which inhibit the protein(s) encoded by hepatitis B virus (HBV) or interfere with the function of the HBV life cycle of the hepatitis B virus and are also useful as antiviral agents. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject suffering from HBV infection. The invention also relates to methods of treating an HBV infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention.

The disclosure features novel lipids and compositions involving the same. Nanoparticle compositions include a novel lipid as well as additional lipids such as phospholipids, structural lipids, and PEG lipids. Nanoparticle compositions further including therapeutic and/or prophylactics such as RNA are useful in the delivery of therapeutic and/or prophylactics to mammalian cells or organs to, for example, regulate polypeptide, protein, or gene expression.

The disclosure features novel lipids and compositions involving the same. Nanoparticle compositions include a novel lipid as well as additional lipids such as phospholipids, structural lipids, and PEG lipids. Nanoparticle compositions further including therapeutic and/or prophylactics such as RNA are useful in the delivery of therapeutic and/or prophylactics to mammalian cells or organs to, for example, regulate polypeptide, protein, or gene expression.