Ketamine derivatives and pharmaceutical compositions thereof are disclosed. When administered orally the ketamine derivatives provide increased bioavailability of ketamine in the systemic circulation. The ketamine derivatives can be used to treat neurological diseases, psychological diseases and pain.

Disclosed are hydroquinone compounds, preparation methods therefor, and uses thereof in anti-tumor or immunomodulation. The structural formula of the hydroquinone compounds are shown by formula I,

##STR00001##

wherein X is CO or CH.sub.2; Y is NH, O or absent; R is: a substituted or unsubstituted alkyl group having at least one carbon atom, a substituted or unsubstituted cycloalkyl group having at least three carbon atoms, a substituted or unsubstituted alkenyl group or alkynyl group having at least two carbon atoms; and a substituted or unsubstituted aryl group or heteroaryl group containing at least four carbon atoms. The compounds provided slowly release 2-tert-butyl-4-methoxyphenol in vivo and maintain stable plasma concentration of 2-tert-butyl-4-methoxyphenol (T1/2=12-24 h). The compounds provided by the present invention protect the phenolic hydroxyl group of 2-tert-butyl-4-methoxyphenol, avoids environmental oxidation and increase the environmental stability of drugs containing the compounds.

Disclosed are hydroquinone compounds, preparation methods therefor, and uses thereof in anti-tumor or immunomodulation. The structural formula of the hydroquinone compounds are shown by formula I,

##STR00001##

wherein X is CO or CH.sub.2; Y is NH, O or absent; R is: a substituted or unsubstituted alkyl group having at least one carbon atom, a substituted or unsubstituted cycloalkyl group having at least three carbon atoms, a substituted or unsubstituted alkenyl group or alkynyl group having at least two carbon atoms; and a substituted or unsubstituted aryl group or heteroaryl group containing at least four carbon atoms. The compounds provided slowly release 2-tert-butyl-4-methoxyphenol in vivo and maintain stable plasma concentration of 2-tert-butyl-4-methoxyphenol (T1/2=12-24 h). The compounds provided by the present invention protect the phenolic hydroxyl group of 2-tert-butyl-4-methoxyphenol, avoids environmental oxidation and increase the environmental stability of drugs containing the compounds.

Disclosed herein are pharmaceutical compositions comprising fencamfamine or fencamfamine related prodrug derivatives for targeted therapeutic applications and methods of synthesizing the compositions.

Disclosed herein are pharmaceutical compositions comprising fencamfamine or fencamfamine related prodrug derivatives for targeted therapeutic applications and methods of synthesizing the compositions.

Provided herein are compounds, compositions, and methods useful for modulating the integrated stress response (ISR) and for treating related diseases; disorders and conditions.

Ketamine derivatives and pharmaceutical compositions thereof are disclosed. When administered orally the ketamine derivatives provide increased bioavailability of ketamine in the systemic circulation. The ketamine derivatives can be used to treat neurological diseases, psychological diseases and pain.

Ketamine derivatives and pharmaceutical compositions thereof are disclosed. When administered orally the ketamine derivatives provide increased bioavailability of ketamine in the systemic circulation. The ketamine derivatives can be used to treat neurological diseases, psychological diseases and pain.

Disclosed are hydroquinone compounds, preparation methods therefor, and uses thereof in anti-tumor or immunomodulation. The structural formula of the hydroquinone compounds are shown by formula I, ##STR00001##
wherein X is CO or CH.sub.2; Y is NH, O or absent; R is a substituted or unsubstituted alkyl group having at least one carbon atom, a substituted or unsubstituted cycloalkyl group having at least three carbon atoms, a substituted or unsubstituted alkenyl group or alkynyl group having at least two carbon atoms; and a substituted or unsubstituted aryl group or heteroaryl group containing at least four carbon atoms. The compounds provided slowly release 2-tert-butyl-4-methoxyphenol in vivo and maintain stable plasma concentration of 2-tert-butyl-4-methoxyphenol (T=1224 h). The compounds provided by the present invention protect the phenolic hydroxyl group of 2-tert-butyl-4-methoxyphenol, avoid environmental oxidation and increase the environmental stability of drugs containing the compounds.

Disclosed are hydroquinone compounds, preparation methods therefor, and uses thereof in anti-tumor or immunomodulation. The structural formula of the hydroquinone compounds are shown by formula I, ##STR00001##
wherein X is CO or CH.sub.2; Y is NH, O or absent; R is a substituted or unsubstituted alkyl group having at least one carbon atom, a substituted or unsubstituted cycloalkyl group having at least three carbon atoms, a substituted or unsubstituted alkenyl group or alkynyl group having at least two carbon atoms; and a substituted or unsubstituted aryl group or heteroaryl group containing at least four carbon atoms. The compounds provided slowly release 2-tert-butyl-4-methoxyphenol in vivo and maintain stable plasma concentration of 2-tert-butyl-4-methoxyphenol (T=1224 h). The compounds provided by the present invention protect the phenolic hydroxyl group of 2-tert-butyl-4-methoxyphenol, avoid environmental oxidation and increase the environmental stability of drugs containing the compounds.