Christie, Parker & Hale, LLP
N-hydroxyurea derivative and pharmaceutical composition containing the same
 A novel N-hydroxyurea derivative represented by formula (I) and having antiallergic and anti-inflammatory effects, i.e., N-hydroxy-N-[6-(3-pyridylmethyl)-2H-1-benzopyran-3-ylmethyl]urea: ##STR1## and medicines containing the above urea derivative or a pharmacologically acceptable salt thereof, or a hydrate or solvate thereof as the active ingredient, particularly antiallergic or anti-inflammatory agent, especially antiasthmatic. 
Nikken Chemicals Co., LTD
A C
A61P C07D
inventional inventional
Hiromasa Toshiya Mina Yoshikazu Michika
Ohmori Komatsu Tsuzuki Kawahara Takano