| 摘要 |
The invention relates to biologically active novel compounds having general formula (I), wherein R1 is aryl, optionally mono- or plurisubstituted with alkyl with 1-6 carbon atoms, hydroxy, alkoxy, halogen, amino or a nitro group, R2 is hydrogen, straight or branched chain alkyl with 1-6 carbon atoms, straight or branched chain alkenyl with 2-6 carbon atoms, straight or branched chain alkynyl with 2-6 carbon atoms, R3 is hydrogen, straight or branched chain alkyl with 1-10 carbon atoms, straight or branched chain alkenyl with 210 carbon atoms, straight or branched chain alkynyl with 2-10 carbon atoms, R4 is hydrogen, straight or branched chain alkyl with 1-6 carbon atoms, straight or branched chain alkenyl with 2-6 carbon atoms, straight or branched chain alkynyl with 2-6 carbon atoms, and R5 is hydroxymethyl, formyl, carboxyl, or carboxyl ester with 1-6 carbon atoms. Also disclosed are methods of preparing said compounds, fungicidal compositions comprising, as an active ingredient, these compounds, use of the compounds, and methods of controlling fungi at loci infested or liable to be infested therewith. Finally an isolated pure culture of the microorganism NN006437 (CBS 331.95) or a mutant thereof capable of producing said compounds.
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