Other

Sankyo Company, Limited

Renascience Co., Ltd.

Kiyoshi Kurokawa

Toshio Miyata

Hiroaki Yanagisawa

Yoshiya Amemiya

To provide a inhibitor of protein modification products formation capable of inhibiting of vitamin B6 deficiency disease as a side effect, especially a renal protective agent. There is provided a use, as an active ingredient, of any of free or salt-form compounds of either of the formulae: (I) (II) [wherein R1 is substituted or unsubstituted aromatic ring; and each of R2, R3 and R4 is a hydrogen atom or monovalent organic group, or alternatively R2 and R3 cooperate to form a condensed ring or R3 and R4 cooperate to represent a divalent organic group, provided that R3 and R4 are not simultaneously hydrogen atoms]. 

Inhibitor of protein modification products formation

The present invention provides a compound represented by the following formula (I) wherein A is a cyclic group etc., B is a 1H-tetrazol-5-yl group or a 2,4-dioxothiazolidin-5-yl group, and Y is a single bond or a C6-10 arylene group, or a pharmacologically acceptable salt thereof or an ester thereof.

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Sinjyuku-ku, Tokyo 162-0061, Japan

Kiyoshi Kurokawa