Miyachi, Hiroyuki; Kiyota, Hiromi; Segawa, Mitsuru (1999). "Design, synthesis and antimuscarinic activity of some imidazolium derivatives". Bioorganic &amp; Medicinal Chemistry Letters. 9 (20): 3003–3008. doi:10.1016/S0960-894X(99)00517-X.
Yuuji Ishiguro, Yasuhiro Aizawa, Masahiro Aono, EP1845091 (2007 to Kyorin Pharmaceutical Co., Ltd.). 
Hiroyuki Miyachi, Kei Okazaki, Hiromi Kiyota, Mitsuru Segawa, US5932607 (1999 to Kyorin Pharmaceutical Co., Ltd.).

Cai Hongfei, et al. CN103772286 (2014 to Jiangxi Qingfeng Pharmaceutical Co Ltd).
Own work
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