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Merck
CN

SML4348

ErSO-TFPy

≥98% (HPLC)

Synonym(s):

(R)-3-(4-Hydroxyphenyl)-3-(3,3,4,4-tetrafluoropyrrolidin-1-yl)-7-(trifluoromethyl)indolin-2-one, (3R)-1,3-dihydro-3-(4-hydroxyphenyl)-3-(3,3,4,4-tetrafluoro-1-pyrrolidinyl)-7-(trifluoromethyl)-2H-Indol-2-one, R-26

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About This Item

Empirical Formula (Hill Notation):
C19H13F7N2O2
CAS Number:
Molecular Weight:
434.31
UNSPSC Code:
12352200
Assay:
≥98% (HPLC)
Form:
powder
Quality level:
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assay

≥98% (HPLC)

form

powder

color

white to beige

solubility

DMSO: 2 mg/mL, clear

storage temp.

-10 to -25°C

Quality Level

Biochem/physiol Actions

ErSO-TFPy potently inhibits multiple ERα+ breast cancer cell lines, exhibiting nanomolar IC50 values (≈ 5-25 nM). Its mechanism of action involves cation dysregulation, leading to cell swelling and the rapid induction of TRPM4-dependent necrotic cell death via activation of the anticipatory Unfolded Protein Response (a-UPR). Remarkably, a single dose of ErSO-TFPy achieves complete regressions of large tumors in preclinical models with sustained effect, despite its short half-life and transient blood exposure. This single-dose efficacy is coupled with excellent tolerability, demonstrated by high maximum tolerated doses (MTD) in mice (150 mg/kg IV), rats (>50 mg/kg IV), and dogs (>5 mg/kg IV), and a favorable therapeutic index, contrasting with multi-dose requirements of typical chemotherapies.

Regulatory Information

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