Abstract: The present invention aims to prevent and/or treat malaria using an antimalarial drug comprising, as an active ingredient, a metal chelator represented by the following formula (I), (III), (IV), (V), (VI), or (VII), such as tris(2-pyridylmethyl)amine.

Abstract: The present invention aims to prevent and/or treat malaria using an antimalarial drug comprising, as an active ingredient, a metal chelator represented by the following formula (I), (III), (IV), (V), (VI), or (VII), such as tris(2-pyridylmethyl)amine.

Abstract: The invention aims to prevent and/or treat malaria using an antimalarial drug comprising, as an active ingredient, a metal chelator represented by the following formula (I), (III), (IV), (V), (VI), or (VII), such as tris(2-pyridylmethyl)amine.

Abstract: The invention aims to prevent and/or treat malaria using an antimalarial drug comprising, as an active ingredient, a metal chelator represented by the following formula (I), (III), (IV), (V), (VI), or (VII), such as tris(2-pyridylmethyl)amine.

Abstract: The present invention aims to prevent and/or treat malaria using an antimalarial drug comprising, as an active ingredient, a metal chelator represented by the following formula (I), (III), (IV), (V), (VI), or (VII), such as tris(2-pyridylmethyl)amine.

Abstract: The present invention aims to prevent and/or treat malaria using an antimalarial drug comprising, as an active ingredient, a metal chelator represented by the following formula (I), (III), (IV), (V), (VI), or (VII), such as tris(2-pyridylmethyl)amine.

Abstract: A compound which has the following formula (1), a process for its production, a pharmaceutical composition comprising the compound as an active ingredient, a method of treating tumor which comprises administering the compound, use of the compound as a medicine, and a microorganism capable of producing the compound. The compound of the present invention is a novel compound which has antitumor action and is useful as a medicine.

Abstract: A compound which has the following formula (1), 1

Abstract: A compound which has the following formula (1), a process for its production, a pharmaceutical composition comprising the compound as an active ingredient, a method of treating tumor which comprises administering the compound, use of the compound as a medicine, and a microorganism capable of producing the compound. The compound of the present invention is a novel compound which has antitumor action and is useful as a medicine.

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 relates to a cancer metastasis inhibitor comprising a benzoic acid derivative as an active ingredient represented by the formula (I) ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and each represents hydrogen atom, hydroxyl group or trimethylsilyl group, or R.sub.3 and R.sub.4 are bonded to each other to form a tetramethylene group substituted with lower alkyl group, and X represents group --COCH.dbd.C(OH)--, group --NHCO-- or group --CONH--, provided that when R.sub.3 and R.sub.4 are bonded to each other to form a tetramethylene group substituted with lower alkyl group, X is group --COCH.dbd.C(OH)-- or group --CONH--, use of the benzoic acid derivative for preparing the cancer metastasis inhibitor and method of inhibiting cancer metastasis, characterized in that an effective amount of the benzoic acid derivative is administered to a mammalian animal for inhibiting metastasis of cancer.

Abstract: A 4-desoxy-4-epipodophyllotoxin derivative of the following formula ##STR1## wherein R and R.sub.1 are as defined in the specification or a pharmaceutically acceptable salt thereof as well as an antitumor composition comprising such derivative or salt as an active ingredient.

Abstract: A 4-desoxy-4-epipodophyllotoxin derivative of the following formula ##STR1## wherein R and R.sub.1 are as defined in the specification or a pharmaceutically acceptable salt thereof as well as an antitumor composition comprising such derivative or salt as an active ingredient.

Abstract: A 4-desoxy-4-epipodophyllotoxin derivative of the following formula ##STR1## wherein R and R.sub.1 are as defined in the specification or a pharmaceutically acceptable salt thereof as well as an antitumor composition comprising such derivative or salt as an active ingredient.

Abstract: This invention provides a 5-substituted uridine derivative of the formula ##STR1## wherein X is F or CF.sub.3, R.sub.1 and R.sub.2 each represent a group --OSi--(R.sub.4)(R.sub.5)(R.sub.6) (wherein R.sub.4, R.sub.5 and R.sub.6 represent C.sub.1 -C.sub.10 alkyl or the like), OH, aminoacyloxy group wherein the amino group may be substituted with lower alkyl group or carboxylalkylcarbonyloxy group, R.sub.3 is a group --OSi(R.sub.4)(R.sub.5)(R.sub.6), H, OH, aminoacyloxy group wherein the amino group may be substituted with lower alkyl group, or carboxylalkylcarbonyloxy group, and at least one of R.sub.1, R.sub.2 and R.sub.3 is a group --OSi--(R.sub.4)(R.sub.5)(R.sub.6), with the proviso that when X is fluorine atom, R.sub.3 is not hydrogen, and an intermediate for the preparation thereof, preparation processes of the derivative and anti-tumor agent containing the derivative as an active ingredient.