PCT / AI / SERM

Sildenafil

CAS 139755-83-2
Formula C₂₂H₃₀N₆O₄S
Half-life 3-4 hours (oral)

Chemical Identity

CAS Number	`139755-83-2`
IUPAC Name	5-[2-ethoxy-5-(4-methylpiperazin-1-yl)sulfonylphenyl]-1-methyl-3-propyl-4H-pyrazolo[4,3-d]pyrimidin-7-one
Molecular Formula	C₂₂H₃₀N₆O₄S
Molecular Weight	474.58 g/mol
SMILES	`CCCC1=NN(C)C2=C1NC(=NC2=O)C3=CC(=CC=C3OCC)S(=O)(=O)N4CCN(C)CC4`
InChIKey	`BNRNXUUZRGQAQC-UHFFFAOYSA-N`
Melting Point	187-189 °C
Solubility	Slightly soluble in water
Half-life	3-4 hours (oral)

Pharmacological Profile

Aromatisation	None
Hepatotoxicity	Low

Known trade names

Viagra
Revatio
Kamagra

External references

PubChem CID 5212
PubMed clinical literature
Wikipedia overview

Data sourced from peer-reviewed pharmacological literature and authoritative chemical databases (PubChem, DrugBank, ChEBI). Provided for identification and research reference only — not medical advice.