Antitumor agent

A tumor cell-proliferation-inhibitory agent comprising, as an effective component, a compound selected from the group consisting of maslinic acid, erythrodiol, ursolic acid, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof.

A tumor cell-killing agent comprising, as an effective component, a compound selected from the group consisting of maslinic acid, erythrodiol, ursolic acid, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof.

A tumor cell-metastasis-inhibitory agent comprising, as an effective component, a compound selected from the group consisting of maslinic acid, erythrodiol, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof.

An antitumor agent comprising, as an effective component, maslinic acid and/or physiologically acceptable salts thereof.

A tumor cell-proliferation-inhibitory agent comprising, as an effective component, maslinic acid and/or physiologically acceptable salts thereof.

A tumor cell-killing agent comprising, as an effective component, maslinic acid and/or physiologically acceptable salts thereof.

A tumor cell-metastasis-inhibitory agent comprising, as an effective component, maslinic acid and/or physiologically acceptable salts thereof.

A method of using one or at least two members selected from the group consisting of maslinic acid, erythrodiol, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof for achieving at least one effect selected from the group consisting of tumor cell-proliferation-inhibitory, tumor cell-killing and tumor cell-metastasis-inhibitory effects.

A tumor cell-proliferation-inhibitory agent comprising, as an effective component, ursolic acid and physiologically acceptable salts thereof or derivatives thereof.

A tumor cell-killing agent comprising, as an effective component, ursolic acid and physiologically acceptable salts thereof or derivatives thereof.

A method of using a compound selected from the group consisting of ursolic acid and physiologically acceptable salts thereof or derivatives thereof as a tumor cell-proliferation-inhibitory agent or a tumor cell-killing agent.

An antitumor agent comprising a compound selected from the group consisting of maslinic acid, erythrodiol, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof;

• and a carrier and/or a diluent.

A raw material for an antitumor agent, comprising a compound selected from the group consisting of maslinic acid, erythrodiol, ursolic acid, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof.

A method of using a compound selected from the group consisting of maslinic acid, erythrodiol, ursolic acid, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof, as a raw material for an antitumor agent.

Use of a compound selected from the group consisting of maslinic acid, erythrodiol, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof for the preparation of an antitumor agent.

Use of a compound selected from the group consisting of maslinic acid, erythrodiol, ursolic acid, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof for the preparation of a tumor cell-proliferation-inhibitory agent.

Use of a compound selected from the group consisting of maslinic acid, erythrodiol, ursolic acid, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof for the preparation of a tumor cell-killing agent.

Use of a compound selected from the group consisting of maslinic acid, erythrodiol, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof for the preparation of a tumor cell-metastasis-inhibitory agent.

A method for inhibiting tumor cell-proliferation comprising the step of bringing a compound selected from the group consisting of maslinic acid, erythrodiol, ursolic acid, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof into contact with tumor cells.

A method for killing tumor cells comprising the step of bringing a compound selected from the group consisting of maslinic acid, erythrodiol, ursolic acid, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof into contact with tumor cells.

A method for inhibiting tumor cell-metastasis comprising the step of bringing a compound selected from the group consisting of maslinic acid, erythrodiol, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof into contact with tumor cells.

A method for inhibiting tumor cell-proliferation comprising the step of incorporating, into tumor cells, a compound selected from the group consisting of maslinic acid, erythrodiol, ursolic acid, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof.

A method for killing tumor cells comprising the step of incorporating, into tumor cells, a compound selected from the group consisting of maslinic acid, erythrodiol, ursolic acid, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof.

A method for inhibiting tumor cell-metastasis comprising the step of incorporating, into tumor cells, a compound selected from the group consisting of maslinic acid, erythrodiol, uvaol, betulinic acid, betulin and physiologically acceptable salts thereof or derivatives thereof.