Riken Corporation

Kabushiki Kaisha Yakult Honsha

Japanese Foundation for Cancer Research

Minoru Yoshida

Hiroyuki Seimiya

Nobuko Yoshimoto

Fumiyuki Shirai

Yoko Yashiroda

Kenichi Washizuka

Takashi Watanabe

Yuko Kano

Yasuko Kouda

Takehiro Fukami

Masayuki Okue

Takeshi Tsumura

Tsubasa Chikada

Junichi Kazami

Provided is a cell proliferation inhibitor comprising a compound of the formula (1) or a pharmacologically acceptable salt thereof: 

Dihydroquinazolinone compound or pharmacologically acceptable salt, and cell growth inhibitor

Provided are 2-(piperidin-1-yl)pyrimidin-4(3H)-ones or pharmaceutically acceptable salts thereof, each characterized by having a 1,8-diazaspiro[4.5]deca-3-ene, 1-oxa-8-azaspiro[4.5]deca-3-ene, 2,8-diazaspiro[4.5]deca-3-ene, 2-oxa-8-azaspiro[4.5]deca-3-ene, 2,9-diazaspiro[5.5]undeca-3-ene, 1-oxa-9-azaspiro[5.5]undeca-3-ene, 1,9-diazaspiro[5.5]undeca-4-ene, or 3,9-diazaspiro[5.5]undeca-1-ene structure represented by the following general formula (1): 

Compound or pharmaceutically acceptable salt thereof

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Wako, Japan

Minoru Yoshida