| abstract |
New macrocyclic compounds of formula I. wherein the dotted line in the 9,10-position optionally denotes a saturated bond or a double bond, and R is hydrogen, methyl or certain acyl radicals, and R₀ is hydrogen, halogen, azido, thiol, hydroxy or -OY, where Y is, among other radicals, an ether radical, a silyl group, a sulfonyl group, a sugar radical or a (thio) acyl radical, where R is methyl, if in 9, 10-position there is a double bond, have microbicidal properties to control plant pathogenic microorganisms. They can be used in conventional formulations to combat plant diseases. |