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Shionogi and Co Ltd
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Shionogi and Co Ltd
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Publication date
Application filed by Shionogi and Co LtdfiledCriticalShionogi and Co Ltd
Publication of JPS5233695ApublicationCriticalpatent/JPS5233695A/en
Pharmaceuticals Containing Other Organic And Inorganic Compounds
(AREA)
Abstract
PURPOSE: Pyridopyridazine derivatives I(where R1 and R2 are 1-4C lower alkyl; R3 is H or 1-4C lower alkyl), e.g. 8-ethyl-3-methoxy-5-oxo-5, 8-dihydropyrido- [2, 3-c] -pyridazine-6-carboxylic acid.