TOYAMA CHEMICAL CO., LTD.; TAISHO PHARMACEUTICAL CO., LTD.; Tanikawa, Tetsuya; Ushiki, Yasunobu; Ushiyama, Fumihito; Yamaguchi, Toru; Ono, Naoya; Yamamoto, Keiko; Tsuruta, Risa; Tsutsui, Yasuhiro; Fujino, Noritomo; Mori, Ayumu Patent: US2014/155597 A1, 2014