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Cat. No.: HY-100312
Handling Instructions

(±)-WS75624B is an endothelin converting enzyme (ECE) inhibitor with an IC50 of 0.03 μg/mL.

For research use only. We do not sell to patients.

(±)-WS75624B Chemical Structure

(±)-WS75624B Chemical Structure

CAS No. : 188048-45-5

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  • Biological Activity

  • Protocol

  • Technical Information

  • Purity & Documentation

  • References


(±)-WS75624B is an endothelin converting enzyme (ECE) inhibitor with an IC50 of 0.03 μg/mL.

IC50 & Target

IC50: 0.03 μg/mL (ECE)[1]

In Vitro

Endothelin converting enzyme (ECE) inhibitors, WS75624A and (±)-WS75624B, have been isolated from the fermentation broth of Saccharothrix sp. No. 75624. WS75624A and (±)-WS75624B show highly potent ECE inhibitory activity, and both have IC50s of 0.03 μg/mL. WS75624A and (±)-WS75624B also show other metalloprotease (collagenase and neutral endopeptidase) inhibitory activity with IC50 s of 1 μg/mL. (±)-WS75624B markedly inhibits ECE activity with an IC50 value of 0.03 μg/mL, while it weakly inhibit collagenase and NEP activities with IC50s of 1.0 μg/mL and 1.25 μg/mL, respectively[1].

In Vivo

(±)-WS75624B inhibits big endothelin-induced pressor effect when administered to SD rat intravenously with big ET-1. WS75624 B (30 mg/kg) markedly attenuates the hypertensive effect of big ET-1 (1 nmol/kg,iv) the inhibiting the conversion of big ET-1 to ET-1[1].

Animal Administration

Male Sprague-Dawley rats (250-300 g) are anesthetized with Pentobarbital sodium (50 mg/kg of boby weight). A femoral artery catheter is implanted for monitoring arterial pressure and heart rate, and a femoral vein catheter is used for injection of saline or drugs. Blood pressure and heart rate is recorded from the femoral artery through a cannula (PE-50) connected to a pressure transducer coupled to a Biophysiograph RM 6000 system. Two groups of rats are injected with the following: Big ET-1 (1 nmol/kg) alone (n=7), big ET-1 (1 nmol/kg) with (±)-WS75624B (30 mg/kg) iv bolus injection (n=7).

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Molecular Weight









Please store the product under the recommended conditions in the Certificate of Analysis.


Room temperature in continental US; may vary elsewhere

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Cat. No.: HY-100312