Pharma company, generic, brand, ingredient and chemical names for drug gefitinib/su011248?

What are the brand, generic, and chemical names for gefitinib (SU011248)?

Gefitinib is marketed as the branded cancer medicine Iressa. [1]
The generic name is also gefitinib. [1]

There is no separate, widely used “ingredient name” distinct from the generic here because gefitinib itself is the active ingredient. [1]

A chemical/descriptor name commonly used for gefitinib is:

- 4-(3-chloro-4-fluorophenylamino)-7-methoxy-6-(morpholin-4-yl)quinazoline
(This is the core chemical name used to define gefitinib’s structure.) [2]

SU011248 is a code/identifier associated with gefitinib development rather than a separate marketed generic/brand. [3]

Why do you see multiple names (code vs generic vs brand) for the same drug?

Drug records often contain several different “name types” for the same medicine:
- Brand name (what patients see on prescriptions), such as Iressa. [1]
- Generic name (the drug substance name), such as gefitinib. [1]
- Chemical name (structure-based naming used in chemistry/databases), such as the quinazoline derivative chemical name listed above. [2]
- Development code/name (often used in early research and filings), such as SU011248 for gefitinib. [3]

What “ingredient” and “active ingredient” mean here

For gefitinib, the ingredient is the active drug substance itself: gefitinib. [1]
So the “ingredient name” and the “generic name” point to the same entity in typical drug references. [1]

Sources

1. https://www.drugs.com/ingredient/gefitinib.html
   
2. https://pubchem.ncbi.nlm.nih.gov/compound/Gefitinib
   
3. https://www.ncbi.nlm.nih.gov/books/NBK11803/