| 摘要 |
The present invention is directed to the use of compounds of Formula (I), as active principals for treating skin conditions and compositions containing these compounds;wherein R4 is (CR5R6-CR7R8-X1)n-CR9R10R11, n is an integer from 1 to 18; R1, R2, R3, R5, R6, R7, R8, R9, R10 and R11, are independently, hydrogen or non-hydrogen substituents; and X, X1, Y and Z are independently NH.
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