| 摘要 |
The present invention relates to a compound of the general formula (I) wherein R1 represents a group selected from the list consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, linear or branched, saturated or mono- or polyunsaturated aliphatic carbon chain containing from two to ten carbon atoms, phenyl, and phenylacetylen, and wherein R2 and R3 independently of each other represent a group selected from the list consisting of Cl, I, methyl, phenyl, or phenylacetylene. |
