C21H28N6O4S
460.6 g/mol
APIWarning
Desmethylsildenafil
CAS139755-82-1
Category
API
Compound Class
Heterocycle
Primary Use
Pharmaceutical Raw Material
Desmethylsildenafil is a chemical compound used as a pharmaceutical reference standard, primarily for analytical testing and quality control in manufacturing environments. It is a derivative of sildenafil and serves as a standardized material for verifying the identity and purity of pharmaceutical products.
Pharmaceutical reference standardAnalytical testing
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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CAS 139755-82-1
Related Compounds
StrongStructure SimilarSimilarity 0.86
Sildenafil
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pharmaceutical raw material
StrongStructure SimilarSimilarity 0.86
Sildenafil citrate
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pharmaceutical raw material
SimilarStructure SimilarSimilarity 0.83
Sildenafil N-oxide
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pharmaceutical intermediate
SimilarStructure SimilarSimilarity 0.75
5-(5-chlorosulfonyl-2-ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo(4,3-D)pyrimidin-7-one
CAS139756-22-2
pharmaceutical raw material
ReferenceSame Category
4-(2-ethoxybenzamido)-1-methyl-3-propylpyrazole-5-carboxamide
CAS139756-03-9
pharmaceutical raw material
ReferenceSame Category
Uk-088800
CAS139756-21-1
pharmaceutical raw material
ReferenceSame Category
Shr-1258 dimaleate
CAS1397922-61-0
pharmaceutical raw material
Referencesame scaffold
Isobutyl sildenafil
CAS1391053-95-4
pharmaceutical raw material
Safety Reference
Warning
H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Identifiers
IUPAC Name
5-(2-ethoxy-5-piperazin-1-ylsulfonylphenyl)-1-methyl-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one
InChIKey
UZTKBZXHEOVDRL-UHFFFAOYSA-N
SMILES
CCCC1=NN(C2=C1N=C(NC2=O)C3=C(C=CC(=C3)S(=O)(=O)N4CCNCC4)OCC)C
Synonyms (17)
- Sildenafil EP Impurity F (N-Desmethyl Sildenafil)
- N-Demethylsildenafil
- N-Desmethylsildenafil
- desmethylsildenafil