| abstract |
The invention provides dimethyl sulfonate of a compound A, a crystal form of the dimethyl sulfonate, application of the dimethyl sulfonate of the compound A in preparation of a medicine for preventing and/or treating mammal diseases, and a medicinal composition containing the dimethyl sulfonate of the compound A, wherein the mammals comprise human beings, and the diseases comprise various cancers, preferably non-small cell lung cancer, particularly mutated non-small cell lung cancer. |