Activus Pharma Co., Ltd.

Yasuyuki Katakami

Hidetsugu Takagaki

Masanori Miyamoto

Yoshiyuki Sano

A quaternary ammonium compound of the present invention is a quaternary ammonium compound represented by general formula (I) or (I') (wherein, A represents a linear alkyl group having 1 to 4 carbon atoms, a branched alkyl group having 2 to 4 carbon atoms, a linear alkyl group having 1 to 4 carbon atoms and a hydroxyl group, or a branched alkyl group having 2 to 4 carbon atoms and a hydroxyl group, Rto Rmay be the same or different and represent a linear or branched alkyl group having 1 to 12 carbon atoms, one of Rto Rrepresents COor SO, while no more than three of the remaining Rto Rrepresent a group selected from the group consisting of a hydroxyl group and an alkoxy group having 1 to 4 carbon atoms, and other Rto Rrepresent a hydrogen atom, one of R&#x2032;to R&#x2032;represents COH or SOH, no more than three of the remaining R&#x2032;to R&#x2032;represent a group selected from a protected hydroxyl group and an alkoxy group having 1 to 4 carbon atoms, while other R&#x2032;to R&#x2032;represent a hydrogen atom, and Xrepresents an anion capable of forming a salt with a quaternary ammonium group).

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Chiba, Japan

Yasuyuki Katakami