| 摘要 |
Compounds of formula V <CHEM> wherein R1 represents hydrogen, fluorine, chlorine, C1-4alkyl or C1-4alkoxy, R5 represents hydrogen or C1-4alkyl and R6 represents hydrogen, C1-4alkyl, phenyl or phenyl mono-subtituted by fluorine, chlorine, C1-4alkyl or C1-4alkoxy. These compounds may be used in the preparation of pharmacologically active substances. |
