| abstract |
Pyrano-pyrazole derivative of the formula <IMAGE> in which R1 represents hydrogen, alkyl, alkanoyl, alkoxycarbonyl, optionally substituted phenyl or optionally substituted phenylalkyl, R2 and R3 can be identical or different and represent hydrogen, alkyl or optionally substituted phenyl, R4 represents cyano, alkyl, alkoxycarbonyl or optionally substituted phenyl, Y represents oxygen, sulphur or the methylene group, X represents halogen, alkyl, alkoxy, alkylthio, halogenoalkyl, dialkylamino, nitro or cyano and n represents a number from 0 to 3, which possess fungicidal activity. |