PCT / AI / SERM

Tadalafil

CAS 171596-29-5
Formula C₂₂H₁₉N₃O₄
Half-life 17.5 hours (oral)

Chemical Identity

CAS Number	`171596-29-5`
IUPAC Name	(6R,12aR)-6-(1,3-benzodioxol-5-yl)-2-methyl-1,2,3,4,6,7,12,12a-octahydropyrazino[1',2':1,6]pyrido[3,4-b]indole-1,4-dione
Molecular Formula	C₂₂H₁₉N₃O₄
Molecular Weight	389.40 g/mol
SMILES	`CN1CC(=O)N2[C@@H](CC3=C2C4=CC=CC=C4N3)C5=CC6=C(C=C5)OCO6)C1=O`
InChIKey	`WOXKDUGGOYFFRN-IIBYNOLFSA-N`
Melting Point	298-300 °C
Solubility	Practically insoluble in water; soluble in DMSO
Half-life	17.5 hours (oral)

Pharmacological Profile

Aromatisation	None
Hepatotoxicity	Low

Known trade names

Cialis
Adcirca
Vilfic

External references

PubChem CID 110635
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.