COA of Formula: C4H8O2, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 453-20-3, molcular formula is C4H8O2, introducing its new discovery.
The present invention relates to aromatic amine pyrimidine or triazine derivatives and its preparation method, pharmaceutical composition and use. Specifically, formula I compound or a pharmaceutically acceptable salt or solvate thereof of, wherein R 1-R 7, X, Y definition of the rights of the specification and in the claims. The invention also relates to a method for the preparation of compounds of formula I, including the drug composition and of their pharmaceutical use. The invention of the formula I compound is an effective tyrosine kinase can not be reversible inhibitors, in particular to EGFR-T790M drug-resistant tumor has a strong inhibiting effect. (by machine translation)
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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem