| abstract |
The subject invention relates to methods and compositions comprising: a) from about 0.1 % to about 5 % of a compound having the structure selected from the group consisting of formulas (I), and (II) wherein each R is independently selected from the group consisting of hydrogen, alkyl, and aryl; each R' is independently selected from the group consisting of hydrogen, alkoxy, and alkyl; Z and Z' are independently selected from the group consisting of NH, O, and CH2 such that when Z or Z' is NH, the other is not O; or a pharmaceutically acceptable salt of any of the aforementioned compounds; and b) a pharmaceutically-acceptable topical carrier. |