| 摘要 |
This invention relates to a derivative of 2-hydroxy-naphthalene of the general formula <IMAGE> wherein A is <IMAGE> and X is -OH or <IMAGE> and R1, R2, R3, and R4 are identical or different and are hydrogen, cycloalkyl having up to eight carbon atoms, which is optionally substituted by lower alkyl groups, aralkyl having up to 10 carbon atoms or aryl which is substituted by lower alkyl, lower alkoxy, halogenalkyl or alkyl-substituted amino groups or by halogen, or R1 and R2 or R3 and R4 in each case are, conjointly with the nitrogen atom to which they are attached, identical or different heterocyclic groups which are optionally substituted by lower alkyl. |
