Abstract: The present invention relates to a novel a compound of formula (I) or its salt. The present invention further relates to process for preparation of Pyroxasulfone using said compound of formula (I) or its salt.

Abstract: The present invention relates to a pharmaceutical composition for preventing and treating a cancer disease, including lung cancer, caused by abnormal cell growth containing a novel trisubstituted pyrimidine derivative with inhibitory activity against protein kinases, including EGFR, and a pharmaceutically acceptable salt thereof as active ingredients. The novel compound of the present invention has strong inhibitory activity against protein kinases. Particularly, the novel compound of the present invention has potent inhibitory effects against various drug-resistant EGFR mutants (including exon 19 deletion-T790M-C797S-EGFR, L858R-T790M-C797S-EGFR, exon 19 deletion-T790M-EGFR, and L858R-T790M-EGFR) and is useful as a prophylactic and therapeutic agent for cancer diseases caused by these EGFR mutants.

Abstract: The present invention relates to a pyrido[[3,4-d]pyrimidine derivative compound showing excellent anti-proliferative efficacy against cancer cells, a pharmaceutically acceptable salt thereof, a hydrate thereof, or a stereoisomer thereof, a production method therefor, a pharmaceutical composition for preventing, alleviating, or treating cancer metastasis and proliferative diseases containing the same as an active ingredient, and an anticancer composition for cancer cells. The compound exhibits excellent inhibitory activity and anti-proliferative efficacy against cancer cells, and thus the compound is useful not only for inhibiting cancer cells, but also for preventing cancer metastasis and proliferative diseases or for treating cancer.

Abstract: The present disclosure relates to a pyrido[3,4-d]pyrimidin-8-one derivative compound exhibiting excellent anti-proliferative effects against cancer cells, a pharmaceutically acceptable salt thereof, a hydrate thereof, or a stereoisomer thereof, a production method therefor, a pharmaceutical composition for preventing, alleviating or treating cancer metastasis and proliferative disease containing the same as an active ingredient, and an anticancer composition against cancer cells. The compound exhibits excellent cancer cell inhibitory activity and anti-proliferative effects, and thus is effective in inhibiting cancer cells, preventing cancer metastasis and proliferative diseases or treating cancer.