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Descriptor English:   Heterocyclic Compounds, 4 or More Rings 
Descriptor Spanish:   Compuestos Heterocíclicos de 4 o más Anillos 
Descriptor Portuguese:   Compostos Heterocíclicos de 4 ou mais Anéis 
Synonyms English:   4-Ring Heterocyclic Compounds
5-Ring Heterocyclic Compounds
Five Ring Heterocyclic Compounds
Four Ring Heterocyclic Compounds
Fused Heterocyclic Compounds, Five Ring
Fused Heterocyclic Compounds, Five-Ring
Fused Heterocyclic Compounds, Four Ring
Fused Heterocyclic Compounds, Four-Ring
Heterocyclic Compounds with 4 or More Rings
Heterocyclic Compounds with Four or More Rings
Heterocyclic Compounds, 4 Ring
Heterocyclic Compounds, 4-Ring
Heterocyclic Compounds, 5 Ring
Heterocyclic Compounds, 5-Ring
Heterocyclic Cpds, 4 Ring
Heterocyclic Cpds, 4 or More Rings
Heterocyclic Cpds, 5 Ring  
Tree Number:   D03.633.400
Definition English:   A class of heterocyclic compounds that include four or more fused rings. Both aromatic or non-aromatic ring structures are included in this category. 
Indexing Annotation English:   general or unspecified; prefer specifics
History Note English:   2017(1998) 
Allowable Qualifiers English:  
AD administration & dosage AE adverse effects
AG agonists AN analysis
AI antagonists & inhibitors BL blood
CF cerebrospinal fluid CS chemical synthesis
CH chemistry CL classification
EC economics HI history
IM immunology IP isolation & purification
ME metabolism PK pharmacokinetics
PD pharmacology PO poisoning
RE radiation effects ST standards
SD supply & distribution TU therapeutic use
TO toxicity UR urine
Record Number:   6732 
Unique Identifier:   D006576 

Occurrence in VHL: