C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 311/56 (2006.01) A61K 31/37 (2006.01) A61K 31/695 (2006.01) C07D 407/12 (2006.01) C07F 7/18 (2006.01)
Patent
CA 2079466
The present invention relates to an extremely effective anti-allergic; agent with a :Low toxicity, which possesses as its active ingredient a benzopyran derivative described by the above general formula (in the formula, R 1 and R 2 are each independently a hydrogen atom, an acyl group, a straight chained or branched alkyl group having 1~12 carbon atoms, or a straight chained or branched alkenyl group having 2~12 carbon atoms; and R 3 is a hydroxyl group, an acyloxy group, an alkoxy group having 1~10 carbon atoms, or an alkenyloxy group having 2~10 carbon atoms).
Abe Masayoshi
Inazawa Kazuhiko
Kimura Nobuyuki
Sakai Mitsuru
Takagaki Hidetsugu
Dainippon Ink & Chemicals Inc.
Kirby Eades Gale Baker
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