isotretinoin

https://doi.org/10.1351/goldbook.10868
Vitamin A-like medication (13-cis retinoic acid) used, among other things, for acne treatment.
Note: Intake during pregnancy has a high teratogenic risk.
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 770 [Terms] [Paper]