| Automatic database searches | PubMed - 15 million citations from MEDLINE and other life science journals. |
Search Pubmed for indole |
| ChemIDplus - Dictionary of over 370,000 chemicals (names, synonyms, and structures). | Search by chemical abstracts number: 120-72-9 |
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| ChemIDplus - Dictionary of over 370,000 chemicals (names, synonyms, and structures). | Search by trivial name: indole | |
| Search Toxicology Literature Online (TOXLINE) | Search TOXLINE for indole | |
| Search Developmental and Reproductive Toxicology Database (DART) | Search DART for indole | |
| Hazardous Substances Data Bank (HSDB) | Search HSDB for indole | |
| Genetic Toxicology Data Bank (GENE-TOX) | Search GENE-TOX for indole | |
| Chemical Carcinogenesis Research Information System (CCRIS) | Search CCRIS for indole |