libraries.md

 # Chemical libraries
 
-The following is a list of chemical .
+The following is a list of chemical libraries that may be used in virtual screening scenarios.
 
-* XX
+* In the SB&NB file-system, compound collections can be found in `/aloy/web_checker/libraries/`.
+* The `chemical_checker` database contains the compound collections, too, in the `libraries` table. 
 
-* Natural products
+## Exemplar collections
 
- * XX
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+These are popular compound libraries that we offer as default search libraries in the [Chemical Checker similarity resource](http://www.chemicalchecker.org).
+
+* Approved drugs: 
+* Experimental drugs:
+* Prestwick chemical library: 
+* 
+*
+
+## Screening libraries
+
+* 
+
+## Natural product databases
+
+We have a particular interest in natural product (NP) databases, mainly because they are likely to be useful for Global Health research.
+
+* South African Natural Compounds Database (SANCDB): [https://sancdb.rubi.ru.ac.za/](https://sancdb.rubi.ru.ac.za/). Contains about 600 NPs, all of them with some degree of bioactivity annotation. Belongs to the Research Unit in Bioinformatics (RUBi), NIH Common Fund and Rhodes University.
+
+* AfroDB: [](). Contains 947 compounds. Coordinated from Cameroon.
+
+* Natural Product Activity and Species Source database (NPASS): [http://bidd2.nus.edu.sg/NPASS/](http://bidd2.nus.edu.sg/NPASS/). Over 35k well-annotated compounds, belonging to 25k organisms.
+
+* Northern African Natural Products Database (NANPDB): [http://african-compounds.org/nanpdb/](http://african-compounds.org/nanpdb/). About 4.5k NPs from Northern Africa, mainly from plants.
+
+* Brazilian Natural Compound Database (NUBBEdb): [https://nubbe.iq.unesp.br/portal/nubbedb.html](https://nubbe.iq.unesp.br/portal/nubbedb.html).
+
+* 
+NUBBEdb: Brazilian Natural Compound Database: https://nubbe.iq.unesp.br/portal/nubbedb.html 
+Traditional Chinese Medicine Database (TCM) . Based in Taiwan.
+
+
+
+## Other databases
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