Nippon Kayaku Kabushiki Kaisha

Masao Onishi

Masaaki Ikeda

Junko Yoshioka

Hisao Ekimoto

Tadayuki Kiyoyanagi

Chieko Seno

Hirofumi Iwamoto

Teruyuki Sakai

Masaaki Saito

Effective treatment of tumors, especially carcinomas, can be achieved by administering to man a photochemotherapeutic agent containing as an active ingredient a compound showing maximum absorption in the wavelength region of 800 to 1,200 nm, and then applying light rays of a wavelength of 800 to 1,200 nm.

Remedies for photochemotherapy

Aminium compounds and optical information recording media containing the same

Thermal recording material and novel crystal of bisphenol S derivative

The present invention relates to a process for producing a dioxazine compound represented by the formula (1) which comprises carrying out a ring closure reaction of a compound represented by the formula (2) in the presence of a dioxazine derivative of the formula (3), colored materials containing this dioxazine compound, and dioxazine compounds having a plate-like crystal form: ##STR1##

Process for producing dioxazine compounds, colored materials therewith

The present invention relates to a process for producing a dioxazine compound represented by the formula (1) which comprises carrying out a ring closure reaction of a compound represented by the formula (2) in the presence of a dioxazine derivative of the formula (3): ##STR1##

Growing community of inventors

Yono, Japan

Masao Onishi