Banyu Pharmaceutical Co. Ltd

Katuhisa Kojiri

Hiroyuki Suda

Masanori Okanishi

Akira Okura

Kenji Kawamura

Koutaro Funaishi

A novel antitumor substance BE-13793C or a pharmaceutically acceptable salt thereof, which is represented by the following formula: ##STR1## an anticancer agent comprising the novel substance or a pharmaceutically acceptable salt thereof, a method of producing the novel substance and a microorganism Streptoverticillium FERM P-10489, capable of producing the novel substance are disclosed.

Streptoverticillium ferm P-10489 which produces antitumor agent BE-13793C

A novel antitumor substance BE-13793C or a pharmaceutically acceptable salt thereof, which is represented by the following formula: ##STR1## an anticancer agent comprising the novel substance or a pharmaceutically acceptable salt thereof, a method of producing the novel substance and a microorganism capable of producing the novel substance are disclosed.

Antitumor substance BE-13793C

An antitumor substance BE-12406 or a pharmaceutically acceptable salt thereof, which is represented by the general formula ##STR1## and a method of producing the novel substance.

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Tokyo, Japan

Katuhisa Kojiri