摘要 |
<p>Compounds of formula (I) wherein: R1, R2, R3 and R4 are the same or different and are selected from H, OH, and OCH3; R is alkyl containing from 5 to 20 carbon atoms; and X is -C(O)- or is absent; are useful in the treatment of acne and may be used in topical anti-acne compositions together with, optionally, a further anti-acne agent which is not a compound of formula (I) and a topically acceptable diluent or carrier.</p> |