Sumitomo Dainippon Pharma Co., Ltd., its U.S.-based subsidiary Sunovion Pharmaceuticals Inc. and Otsuka Pharmaceutical Co., Ltd. announce today that we have executed a collaboration and license agreement for worldwide joint development and commercialization of the following four novel candidate compounds (hereinafter referred to as the "four compounds") currently under development in psychiatry and neurology area by Sumitomo Dainippon Pharma and Sunovion.

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