Lookup by ZINC code. ZINC codes may be looked at one at a time or up to 1000 at once to find SMILES and purchasing information (Figure ). Following a screening campaign, the user may return here to look up the latest purchasing information for the codes and to put the available molecules and perhaps their close analogs into the shopping cart for purchasing. The interface supports both ZINC-22 codes as well as ZINC20 (ZINC15) codes. Lookup by ZINC code uses the Sn databases and ZINC20 (see Methods). To use lookup by ZINC code, the user browses to cartblanche22.docking.org and then selects Lookup > by ZINC code from the popup menu. It is also possible to download the entire mapping of vendor codes to ZINC codes (see Methods), but as this information changes frequently, we recommend returning to the website to look up the latest purchasing information.