> For the complete documentation index, see [llms.txt](https://semanticchemistdocs.knowledgator.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://semanticchemistdocs.knowledgator.com/welcome-to-semantic-chemist-documentation.md).

# Welcome to Semantic Chemist documentation!

## Overview

The Semantic Chemist DB manages data about chemical substances that can be found on PubChem. The API supports the following types of requests:

* **Search by SMILES**: Allows users to search for chemical substances using their SMILES (Simplified Molecular Input Line Entry System) notation.
* **Search by IUPAC**: Enables searching by the International Union of Pure and Applied Chemistry (IUPAC) name of the chemical substance.
* **Search by Name**: Supports searches by both IUPAC names and synonyms of the chemical substance.
* **Search by CID**: Allows users to search using the PubChem Compound Identifier (CID).

See more about API entry points here:

{% content-ref url="/pages/68U0SgXAhMW7KR4kzNLK" %}
[Search by SMILES](/api/search-by-smiles.md)
{% endcontent-ref %}

{% content-ref url="/pages/zRgYrhxxgw3oJUXnoeEz" %}
[Search by IUPAC](/api/search-by-iupac.md)
{% endcontent-ref %}

{% content-ref url="/pages/Sd5H7iFDj4F0RjDj6iNx" %}
[Search by Name](/api/search-by-name.md)
{% endcontent-ref %}

{% content-ref url="/pages/E4cfS49rwmNbyC4zdjPI" %}
[Search by InChI](/api/search-by-inchi.md)
{% endcontent-ref %}

{% content-ref url="/pages/PTcyVZFUFsWZaRxAxuNn" %}
[Search by InChIKey](/api/search-by-inchikey.md)
{% endcontent-ref %}

{% content-ref url="/pages/NVo9YjOB7CMZqt64iBOw" %}
[Search by CID](/api/search-by-cid.md)
{% endcontent-ref %}