The present invention provides a compound represented by Formula (I):

##STR00001##

wherein ring A is a substituted or unsubstituted heterocycle; ring C is a benzene ring or the like; R.sup.1 is halogen or the like; R.sup.2a and R.sup.2b are each independently hydrogen or the like; R.sup.3 is substituted or unsubstituted alkyl or the like; R.sup.4 is hydrogen or the like; and n is an integer of 1 to 3.

Disclosed in the present invention are a fused pyridone compound, and a preparation method therefor and a use thereof. Specifically, the present invention discloses a compound of formula (I-B), an optical isomer thereof and a pharmaceutically acceptable salt thereof, and the use of the compound as a KRAS inhibitor.

##STR00001##

Disclosed in the present invention are a fused pyridone compound, and a preparation method therefor and a use thereof. Specifically, the present invention discloses a compound of formula (I-B), an optical isomer thereof and a pharmaceutically acceptable salt thereof, and the use of the compound as a KRAS inhibitor.

##STR00001##

The present invention relates to a novel compound that has antiviral activity, in particular, inhibitory activity against the integrase of the human immunodeficiency virus (HIV).

The subject of this invention is a novel annelated 9-hydroxy-1,8-dioxo-1,3,4,8-tetrahydro-2H-pyrido[1,2-a]pyrazine-7-carboxamide of general formula 1 or 2, or any stereoisomer, any pharmaceutically acceptable salt, any solvate, or any crystalline or polycrystalline form thereof

##STR00001## wherein ring A.sup.1 is an optionally methyl-substituted 5-7 membered saturated heterocycle or heterobicycle; ring A.sup.2 is a 5-6 membered optionally methyl-substituted saturated or partially saturated monocyclic heterocycle; ring A.sup.3 is a 5-6 membered monocyclic saturated cycloalkane or tetrahydro-2H-pyran; R is a 5-7 membered optionally substituted with one, two, or three optionally identical substituents monocyclic or bicyclic heterocyclic radical comprising 1-4 heteroatoms selected from the series O, S, and N except (2S,5R,13aS)-8-hydroxy-7,9-dioxo-N-{[3-(trifluoromethyl)-pyridin-2-yl]methyl}-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopurido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide (formula A4) and (1R,4S,12aR)-N-[(3,5-difluoropyridin-2-yl)methyl]-7-hydroxy-6,8-dioxo-1,2,3,4,6,8,12,12a-octahydro-1,4-methanodipyrido[1,2-a:1′,2′-d]pyrazine-9-carboxamide (formula A5).

The present invention relates to a novel compound that has antiviral activity, in particular, inhibitory activity against the integrase of the human immunodeficiency virus (HIV).

The subject of this invention is a novel annelated 9-hydroxy-1,8-dioxo-1,3,4,8-tetrahydro-2H-pyrido[1,2-a]pyrazine-7-carboxamide of general formula 1 or 2, or any stereoisomer, any pharmaceutically acceptable salt, any solvate, or any crystalline or polycrystalline form thereof

##STR00001## wherein ring A.sup.1 is an optionally methyl-substituted 5-7 membered saturated heterocycle or heterobicycle; ring A.sup.2 is a 5-6 membered optionally methyl-substituted saturated or partially saturated monocyclic heterocycle; ring A.sup.3 is a 5-6 membered monocyclic saturated cycloalkane or tetrahydro-2H-pyran; R is a 5-7 membered optionally substituted with one, two, or three optionally identical substituents monocyclic or bicyclic heterocyclic radical comprising 1-4 heteroatoms selected from the series O, S, and N except (2S,5R,13aS)-8-hydroxy-7,9-dioxo-N-{[3-(trifluoromethyl)-pyridin-2-yl]methyl}-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopurido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepine-10-carboxamide (formula A4) and (1R,4S,12aR)-N-[(3,5-difluoropyridin-2-yl)methyl]-7-hydroxy-6,8-dioxo-1,2,3,4,6,8,12,12a-octahydro-1,4-methanodipyrido[1,2-a:1′,2′-d]pyrazine-9-carboxamide (formula A5).

A three fused ring derivative-containing salt and a crystal form thereof. In particular, the present invention relates to a compound having general formula (I), a crystal form thereof, a preparation method therefor, a pharmaceutical composition containing a therapeutically effective amount of the compound and the crystal form thereof, and use thereof in the preparation of a medicament for treating PI3K-mediated related diseases.

##STR00001##

A three fused ring derivative-containing salt and a crystal form thereof. In particular, the present invention relates to a compound having general formula (I), a crystal form thereof, a preparation method therefor, a pharmaceutical composition containing a therapeutically effective amount of the compound and the crystal form thereof, and use thereof in the preparation of a medicament for treating PI3K-mediated related diseases.

##STR00001##

A process for preparing a sodium (2R,5S,13aR)-7,9-dioxo-10-((2,4,6-trifluorobenzyl) carbamoyl)-2,3,4,5,7,9,13,13a-octahydro-2,5-methanopyrido [1′,2′:4,5] pyrazino[2,1-b][1,3]oxazepin-8-olate of Formula 1 and its polymorphic form thereof.

##STR00001##

The present disclosure features useful methods to treat cancer, e.g., in a subject in need thereof. The methods described herein are useful in the treatment of disorders associated with GRK2 expression, e.g., cancer or cardiovascular disease. The present disclosure also features compounds (e.g., GRK2 inhibitors), pharmaceutically acceptable salts thereof, and pharmaceutical compositions thereof.

Novel compounds having formula (I) and methods of using these compounds to treat diseases, conditions, and disorders are described.

##STR00001##