The present invention relates to methods for treating cannabis biomass in order to isolate tetrahydrocannabinolic acid (THCA). In another aspect, the present invention relates to a process that involves purification followed by extraction of cannabis biomass to isolate and improve yields of high-purity crystalline extracts.

The present invention relates to methods for treating cannabis biomass in order to isolate tetrahydrocannabinolic acid (THCA). In another aspect, the present invention relates to a process that involves purification followed by extraction of cannabis biomass to isolate and improve yields of high-purity crystalline extracts.

A compound having structures represented by the following formulas (1) or (2): wherein in the formulas (1) and (2), at least one of R.sub.1 to R.sub.8 is a deuterium atom.

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A compound having structures represented by the following formulas (1) or (2): wherein in the formulas (1) and (2), at least one of R.sub.1 to R.sub.8 is a deuterium atom.

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The present invention relates to iridium complexes suitable for use in organic electroluminescent devices, especially as emitters.

The invention relates to a composition comprising an electron-transporting host and a hole-transporting host, to the use thereof in electronic devices and to electronic devices containing said composition. The electron-transporting host is most preferably selected from the class of triazine-dibenzofurane-fluorenyl systems or from the class of triazine-dibenzothiophene-fluorenyl systems. The hole-transporting host is preferably selected from the class of biscarbazoles.

The invention relates to a composition comprising an electron-transporting host and a hole-transporting host, to the use thereof in electronic devices and to electronic devices containing said composition. The electron-transporting host is most preferably selected from the class of triazine-dibenzofurane-fluorenyl systems or from the class of triazine-dibenzothiophene-fluorenyl systems. The hole-transporting host is preferably selected from the class of biscarbazoles.

A method of making diimide and dianhydride that includes contacting a nitro or halo N-substituted phthalimide with bisphenol in polar aprotic solvents, such as dimethylsulfoxide and sodium hydride to provide high conversion to a diimide; precipitating the product in acetic acid solution and filtration; treating the resulting solid, N-substituted diimide with a carboxylic acid and substituted or unsubstituted dimethyl sulfoxide in an aqueous medium to provide a reaction mixture including tetra acid, triacid, imide diacid and diimide along with substituted or unsubstituted acetic acid, dimethyl sulfoxide and their derivatives. The method includes the isolation of tetra acid by precipitation in water followed by centrifuge or filtration. The tetra acid is converted into the corresponding dianhydride. The dianhydride prepared by the method are also described as precursor to make polyetherimide.

A method of making diimide and dianhydride that includes contacting a nitro or halo N-substituted phthalimide with bisphenol in polar aprotic solvents, such as dimethylsulfoxide and sodium hydride to provide high conversion to a diimide; precipitating the product in acetic acid solution and filtration; treating the resulting solid, N-substituted diimide with a carboxylic acid and substituted or unsubstituted dimethyl sulfoxide in an aqueous medium to provide a reaction mixture including tetra acid, triacid, imide diacid and diimide along with substituted or unsubstituted acetic acid, dimethyl sulfoxide and their derivatives. The method includes the isolation of tetra acid by precipitation in water followed by centrifuge or filtration. The tetra acid is converted into the corresponding dianhydride. The dianhydride prepared by the method are also described as precursor to make polyetherimide.

Provided are a pyranochromenyl phenol derivative, a pharmaceutically acceptable salt thereof, or a solvate thereof. Also provided is a pharmaceutical composition for preventing or treating metabolic syndrome or inflammatory disease comprising same. The present invention is efficacious in preventing or treating metabolic syndrome or inflammatory disease and is chemically stable.