Date published: 2026-1-23

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DHCR7 Inhibitors

DHCR7 inhibitors as a chemical class generally consist of compounds that can reduce the enzymatic conversion of 7-dehydrocholesterol to cholesterol. AY-9944 is a well-known inhibitor of DHCR7, causing an increase in 7-DHC while reducing the production of cholesterol. Compounds like BM15766 are also noted for their inhibitory activity on DHCR7, though their availability is limited outside of research contexts. Triparanol is another compound with historical significance as a DHCR7 inhibitor. Although it effectively reduces cholesterol synthesis by inhibiting DHCR7, Cholesterol synthesis inhibitors like zaragozic acid or squalestatin, which target squalene synthase, or antifungals like terbinafine targeting squalene epoxidase, may have indirect effects on DHCR7 by reducing the pool of sterol precursors available for the final conversion step that DHCR7 catalyzes. Lastly, while statins (e.g., lovastatin, simvastatin, pravastatin, atorvastatin, rosuvastatin) are not direct inhibitors of DHCR7, they are included in this list as they are well-known for inhibiting HMG-CoA reductase, the rate-limiting enzyme in cholesterol biosynthesis. Their action results in reduced synthesis of all downstream cholesterol precursors, which could indirectly diminish the activity of DHCR7 by decreasing the substrate concentration. These compounds can affect DHCR7 activity by directly inhibiting the enzyme or by altering the levels of substrates and intermediates required for the synthesis of cholesterol.
Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

AY 9944

366-93-8sc-202965
5 mg
$145.00
4
(1)

AY 9944 is a selective inhibitor of DHCR7, an enzyme integral to cholesterol synthesis. Its unique structural features enable it to bind effectively to the enzyme's active site, thereby modulating the enzymatic activity. This interaction disrupts the normal metabolic pathway, resulting in altered sterol profiles. Furthermore, AY 9944 exhibits distinct physicochemical properties that influence its solubility and distribution in biological systems, impacting its overall bioavailability.

BM 15766 sulfate

86621-94-5sc-210953
sc-210953A
1 mg
5 mg
$225.00
$849.00
1
(1)

BM 15766 sulfate acts as a potent inhibitor of DHCR7, characterized by its ability to form stable complexes with the enzyme. This compound's unique molecular architecture facilitates specific interactions with key amino acid residues, leading to a significant reduction in enzymatic activity. The compound's kinetic profile reveals a rapid onset of inhibition, while its solubility characteristics suggest a favorable distribution in lipid-rich environments, enhancing its interaction with membrane-associated targets.

Triparanol

78-41-1sc-208472
sc-208472A
5 mg
25 mg
$245.00
$811.00
1
(1)

Previously used as a cholesterol-lowering agent, it inhibits DHCR7, but was withdrawn due to toxic side effects.

U 18666A

3039-71-2sc-203306
sc-203306A
10 mg
50 mg
$143.00
$510.00
2
(1)

Can inhibit DHCR7 and is used experimentally to induce a cellular model of Smith-Lemli-Opitz syndrome.

Zaragozic Acid A

142561-96-4sc-391058
sc-391058A
1 mg
5 mg
$225.00
$615.00
7
(1)

Also known as squalestatin, inhibits squalene synthase but may have downstream effects on DHCR7 activity.

Terbinafine

91161-71-6sc-338609
100 mg
$560.00
1
(0)

An antifungal known to inhibit squalene epoxidase, could influence DHCR7 activity indirectly by substrate depletion.

Fenpropimorph

67564-91-4sc-396899C
sc-396899D
sc-396899A
sc-396899E
sc-396899
sc-396899B
10 mg
25 mg
50 mg
100 mg
250 mg
1 g
$189.00
$250.00
$291.00
$393.00
$683.00
$2290.00
1
(3)

A fungicide that inhibits sterol biosynthesis, potentially affecting DHCR7 by altering sterol precursor levels.

Lovastatin

75330-75-5sc-200850
sc-200850A
sc-200850B
5 mg
25 mg
100 mg
$29.00
$90.00
$339.00
12
(1)

While its primary target is HMG-CoA reductase, its downstream effects can reduce substrate availability for DHCR7.

Pravastatin, Sodium Salt

81131-70-6sc-203218
sc-203218A
sc-203218B
25 mg
100 mg
1 g
$69.00
$162.00
$787.00
2
(1)

Another statin that, though targeting HMG-CoA reductase, may also impact DHCR7 function indirectly.