Chromone derivatives

Details Chromone derivatives Chromone derivatives

C - Chemistry, Metallurgy

07

D

260/304.7

C07D 405/04 (2006.01) C07D 257/04 (2006.01) C07D 311/22 (2006.01)

Patent

CA 1069511

Abstract The present invention relates to novel chromone derivatives having effective antiallergic action with low toxicity, which are shown by the following formula (I) Image wherein R is hydrogen or lower alkyl and A is Image (R' is hydrogen or lower alkyl) or Image , and their physiologically acceptable salts.

249985

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