Evaluation of 13-cis-12-substituted analogues of retinoic acid in a se
ries of dermatologic screens has revealed that structural modification
s can lead to selectivity and specificity. An analogue, 11-cis,13-cis-
12-hydroxymethylretinoic acid, delta-lactone, has been found to have g
ood activity and to be devoid of topical and systemic toxicity.