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SML3660

Sigma-Aldrich

RPL554

≥98% (HPLC)

Synonym(s):

9,10-Dimethoxy-2(2,4,6-trimethylphenylimino)-3-(N-carbamoyl-2-aminoethyl)-3,4,6,7-tetrahydro-2H-pyrimido[6,1-a]isoquinolin-4-one], Ensifentrine, N-[2-[6,7-Dihydro-9,10-dimethoxy-4-oxo-2-[(2,4,6-trimethylphenyl)imino]-2H-pyrimido[6,1-a]isoquinolin-3(4H)-yl]ethyl]-urea, RPL 554, [2-[6,7-Dihydro-9,10-dimethoxy-4-oxo-2-[(2,4,6-trimethylphenyl)imino]-2H-pyrimido[6,1-a]isoquinolin-3(4H)-yl]ethyl]-urea

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About This Item

Empirical Formula (Hill Notation):
C26H31N5O4
CAS Number:
298680-25-8
Molecular Weight:
477.56
MDL number:
MFCD09970918
UNSPSC Code:
12352200
NACRES:
NA.21

Quality Level

100

Assay

≥98% (HPLC)

form

powder

color

white to beige

solubility

DMSO: 2 mg/mL, clear (Warmed)

storage temp.

-10 to -25°C

Biochem/physiol Actions

RPL554 (Ensifentrine) is a long acting, potent and specific dual inhibitor of PDE 3/4 (phosphodiesterase 3 and 4). RPL554 displays a broad range of both bronchoprotective and anti-inflammatory activities. Also, RPL554 synergizes with anti-muscarinic drugs in inhibition of ASM tone. RPL554 (Ensifentrine) exhibits anti-inflammatory effects through reduced production of the monocyte chemoattractant protein-1 (MCP-1) and granulocyte monocyte colony stimulating factor (GM-CSF) in cystic fibrosis bronchial epithelial cells during challenge with Interleukin-1β.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Mark J Turner et al.
The Journal of pharmacology and experimental therapeutics, 375(3), 414-429 (2020-10-06)
Cystic fibrosis (CF) is caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) anion channel that impair airway salt and fluid secretion. Excessive release of proinflammatory cytokines and chemokines by CF bronchial epithelium during airway infection leads to
Victoria Boswell-Smith et al.
The Journal of pharmacology and experimental therapeutics, 318(2), 840-848 (2006-05-10)
The pharmacology of two novel, trequinsin-like PDE3/4 inhibitors, RPL554 [9,10-dimethoxy-2(2,4,6-trimethylphenylimino)-3-(N-carbamoyl-2-aminoethyl)-3,4,6,7-tetrahydro-2H-pyrimido-[6,1-a]isoquinolin-4-one] and RPL565 [6,7-dihydro-2-(2,6-diisopropylphenoxy)-9,10-dimethoxy-4H-pyrimido[6,1-a]isoquinolin-4-one], has been investigated in a number of in vitro and in vivo assays. Electrical field stimulation-induced contraction of guinea pig superfused isolated tracheal preparations was significantly inhibited
Luigino Calzetta et al.
The Journal of pharmacology and experimental therapeutics, 346(3), 414-423 (2013-06-15)
The phosphodiesterase (PDE) enzyme family hydrolyzes cAMP and cGMP, second messengers that regulate a variety of cellular processes, including airway smooth muscle (ASM) relaxation and the inhibition of inflammatory cells. We investigated the activity of RPL554 [9,10-dimethoxy-2(2,4,6-trimethylphenylimino)-3-(n-carbamoyl-2-aminoethyl)-3,4,6,7-tetrahydro-2H-pyrimido[6,1-a]isoquinolin-4-one], a dual PDE3/PDE4

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