Abstract: An antitumor agent comprising a compound selected from the group consisting of Compounds A to D described in the specification, or a salt thereof, for treating a malignant tumor patient expressing EGFR having exon 20 insertion mutation.

Abstract: An antitumor agent comprising a compound selected from the group consisting of Compounds A to D described in the specification, or a salt thereof, for treating a malignant tumor patient expressing EGFR having exon 20 insertion mutation.

Abstract: To provide a novel compound having a HER2 inhibitory effect and having a cytostatic effect. It is also intended to provide a medicament useful in the prevention and/or treatment of a disease involving HER2, particularly, cancer, on the basis of the HER2 inhibitory effect. The present invention provides a compound of formula (I) wherein X, Y, Z1, Z2, Z3, Z4, W, n, R1, R2, and R3 have meanings as defined in the present specification, or a salt thereof.

Abstract: To provide a novel compound having a HER2 inhibitory effect and having a cytostatic effect. It is also intended to provide a medicament useful in the prevention and/or treatment of a disease involving HER2, particularly, cancer, on the basis of the HER2 inhibitory effect. The present invention provides a compound of formula (I) wherein X, Y, Z1, Z2, Z3, Z4, W, n, R1, R2, and R3 have meanings as defined in the present specification, or a salt thereof.

Abstract: To provide a novel compound having a HER2 inhibitory effect and having a cytostatic effect. It is also intended to provide a medicament useful in the prevention and/or treatment of a disease involving HER2, particularly, cancer, on the basis of the HER2 inhibitory effect. The present invention provides a compound of formula (I) wherein X, Y, Z1, Z2, Z3, Z4, W, n, R1, R2, and R3 have meanings as defined in the present specification, or a salt thereof.

Abstract: To provide a novel compound having a HER2 inhibitory effect and having a cytostatic effect. It is also intended to provide a medicament useful in the prevention and/or treatment of a disease involving HER2, particularly, cancer, on the basis of the HER2 inhibitory effect. The present invention provides a compound of formula (I) wherein X, Y, Z1, Z2, Z3, Z4, W, n, R1, R2, and R3 have meanings as defined in the present specification, or a salt thereof.

Abstract: This invention relates to an immunomodulator comprising, as an active ingredient, (S)—N-(4-amino-5-(quinolin-3-yl)-6,7,8,9-tetrahydropyrimido[5,4-b]indolizin-8-yl)acrylamide represented by Formula (I) or a salt thereof and a pharmaceutical composition for the prevention or treatment of a disease that can be ameliorated via immunomodulation.

Abstract: This invention provides a drug which has inhibitory activities against thymidine phosphorylase and inhibits metastasis of a cancer. Specifically, this invention relates to a cancerous metastasis inhibitor comprising, as an active ingredient, a uracil derivative represented by the following formula (1): wherein R1 represents a chlorine, bromine or iodine atom or a cyano or lower alkyl group and R2 represents a substituted or unsubstituted 4-8 membered hetero-cyclic group having nitrogen atoms or a substituted or unsubstituted amidinothio, guanidino, (lower alkyl)amidino, amino or like group, or a salt thereof.

Abstract: The present invention provides monoclonal antibodies against peptides having an amino acid sequence described in Sequence No. 1 or No. 2, the peptides being found in human thymidine phosphorylase and human platelet-derived endothelial cell growth factor. The Invention also provides an immunoassay for human thymidine phosphorylase and/or human platelet-derived endothelial cell growth factor using the monoclonal antibodies. The monoclonal antibodies of the invention recognize human thymidine phosphorylase and human platelet-derived endothelial cell growth factor, and thus are useful in the diagnosis and treatment of various tumors and their metastasis and diseases accompanying abnormal angiogenesis.