You can expect 4-10 week delivery time and a 60-70% purchase success rate for these make-on-demand catalogs. (Compare this with less than two week delivery time and 80-90% fulfillment rate for in stock catalogs.) Make-to-order compounds are included in the standard "lead like" and "fragment like" subsets, but not in the immediate delivery subsets like "leads-now" and "frags-now". In this way you can manage delivery time and fulfillment rate to suit your project's requirements.
 These databases have been provided to us under collaborative agreements with each respective catalog owner. Catalogs have been filtered for drug discovery relevance, and thus compounds in the original catalog may not be in ZINC. Some documentation on ZINC subsets is available.
ZINC may be used free of charge for research by individuals and institutions. Whereas you are free to share the results of a ZINC search or a screen of molecules from ZINC, you may not redistribute major portions of ZINC without the express written permission of John Irwin.