Ulobetasol

Ulobetasol (INN) or halobetasol (USAN) is a corticosteroid used to treat psoriasis.^[1][2] It is a class I corticosteroid under the US classification and a group III corticosteroid under international classification, the most potent group of such drugs.^[3][4]

Ulobetasol

Clinical data
Trade names	Ultravate
Other names	(6S,8S,9S,10S,11S,13S,14S,16S,17R)-17-(2-Chloroacetyl)-6,9-difluoro-11,17-dihydroxy-10,13,16-trimethyl-6,7,8,11,12,14,15,16-octahydrocyclopenta[a]phenanthren-3-one, halobetasol (USAN US)
AHFS/Drugs.com	Professional Drug Facts
MedlinePlus	a601060
ATC code	D07AC21 (WHO) D05AX55 (WHO) (combination with tazarotene)
Identifiers
IUPAC name (6α,11β,16β)-21-Chloro-6,9-difluoro-11,17-dihydroxy-16-methylpregna-1,4-diene-3,20-dione
CAS Number	98651-66-2 N
PubChem CID	5311167
ChemSpider	4470691 Y
UNII	9P6159HM7T
KEGG	D08660 Y
ChEMBL	ChEMBL1201360 N
CompTox Dashboard (EPA)	DTXSID60243759
Chemical and physical data
Formula	C22H27ClF2O4
Molar mass	428.90 g·mol−1
3D model (JSmol)	Interactive image
SMILES ClCC(=O)[C@]3(O)[C@]2(C[C@H](O)[C@]4(F)[C@@]/1(\C(=C/C(=O)\C=C\1)[C@@H](F)C[C@H]4[C@@H]2C[C@@H]3C)C)C
InChI InChI=1S/C22H27ClF2O4/c1-11-6-13-14-8-16(24)15-7-12(26)4-5-19(15,2)21(14,25)17(27)9-20(13,3)22(11,29)18(28)10-23/h4-5,7,11,13-14,16-17,27,29H,6,8-10H2,1-3H3/t11-,13-,14-,16-,17-,19-,20-,21-,22-/m0/s1 Y Key:LEHFPXVYPMWYQD-XHIJKXOTSA-N Y
NY (what is this?)  (verify)

Ulobetasol propionate is usually supplied as a 0.05% topical cream.^[1] Ulobetasol is the strongest topical steroid available.^{[citation needed]} It is also sold with tazarotene with 0.01% halobetasol and 0.045% tazarotene as a lotion branded as Duobrii (Bausch Health).

It is available as a generic medication.^[5]