The present invention discloses a compound as a sodium channel regulator, and this type of compound can effectively inhibit and block the activity of Nav1.8 ion channel, a subtype of voltage-gated sodium channels, and can be used as a specific Nav1.8 inhibitor and to prepare drugs for the treatment of pain diseases mediated by Nav1.8 such as of intestinal pain, neuropathic pain, musculoskeletal pain, acute pain, inflammatory pain, cancer pain, primary pain, multiple sclerosis, Charcot-Marie-Tooth syndrome, incontinence, and cardiac arrhythmia, with broad application prospects.

The present invention provides compounds of formula (I) and pharmaceutically acceptable salts thereof, wherein R.sup.1 and R.sup.2 are as defined in the specification, processes for their preparation, pharmaceutical compositions containing them and their use in therapy.

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The present invention provides compounds of formula (I) and pharmaceutically acceptable salts thereof, wherein R.sup.1 and R.sup.2 are as defined in the specification, processes for their preparation, pharmaceutical compositions containing them and their use in therapy.

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Disclosed herein are dihydroceramide desaturase 1 (Des1) inhibitor compounds and compositions, which are useful in the treatment of diseases, such as metabolic disorders, where inhibition of Des1 is expected to be therapeutic to a patient. Methods of inhibition of Des1 activity in a human or animal subject are also provided.

The invention relates to compounds and methods of using said compounds, as well as pharmaceutical compositions containing such compounds, for treating diseases and conditions mediated by TEAD, such as cancer.

Novel bromodomain and extraterminal domain (BET) inhibitors and to therapeutic methods of treating conditions and diseases using these novel BET inhibitors are provided.

Novel bromodomain and extraterminal domain (BET) inhibitors and to therapeutic methods of treating conditions and diseases using these novel BET inhibitors are provided.

A 6-oxo-1,6-dihydropyridazine derivative, a preparation method therefor and medical use thereof, in particular, a 6-oxo-1,6-dihydropyridazine derivative represented by general formula (I), a preparation method therefor, and a pharmaceutical composition containing the derivative, and use thereof as a Nav inhibitor and use thereof in the preparation of a drug for the treatment and/or prevention of pain and pain-related diseases. Each substituent in general formula (I) is the same as defined in the description.

##STR00001##

A 6-oxo-1,6-dihydropyridazine derivative, a preparation method therefor and medical use thereof, in particular, a 6-oxo-1,6-dihydropyridazine derivative represented by general formula (I), a preparation method therefor, and a pharmaceutical composition containing the derivative, and use thereof as a Nav inhibitor and use thereof in the preparation of a drug for the treatment and/or prevention of pain and pain-related diseases. Each substituent in general formula (I) is the same as defined in the description.

##STR00001##

The present invention provides compounds of formula (I) and pharmaceutically acceptable salts thereof, wherein R.sup.1 and R.sup.2 are as defined in the specification, processes for their preparation, pharmaceutical compositions containing them and their use in therapy. ##STR00001##