John Irwin's blog

Looking to hire a computing specialist to help us take ZINC15 to the next level

Please pass along to appropriate individuals. Thank you

ZINC15 will become on June 1, 2016

Dear ZINC Fans

We will promote to on or around June 1, 2016.

You will still be able to to access the old version as

If you have scripts that use ZINC12, please start changing now to ZINC15.
If you have any trouble doing this, please write me. I would be happy to help, if I can.

We will be making more announcements leading up to the ACS in San Diego. Watch this space.

Thank you for your patience as we transition to ZINC15.


ZINC15 is back up! thanks for your patience

We are back! We promise to do our utmost to avoid that kind of outage in future!

-- John

ZINC15 undergoing maintenance

Dear ZINC Fans

ZINC15 is offline this morning as we undo some maintenance we did last night. We hope to be back up again very soon, but right now, we're not sure how long it is going to take.

Thanks for your patience!

ZINC Database Team

PAINS questioned

Peter Kenny @pwk2013 just brought an interesting paper to my attention:

Privileged Scaffolds or Promiscuous Binders: A Comparative Study on Rhodanines and Related Heterocycles in Medicinal Chemistry

In short, hydantoins, rhodanines, thiohydantoins, and thiazolidinediones might not be as problematic (PAINs-y) as is often widely assumed. Interesting data, definitely worth a look before you throw out that baby with your bathwater.

Free tool to find PAINS patterns

Dear Ligand Discovery Fans

There is a new tool to help you find PAINS patterns, part of ZINC15:

Enter the molecule (SMILES, ZINC ID, Name or Draw it) and click "Identify". If a PAINS pattern matches, it will be shown. An empty result indicates no match. Since it is in ZINC15, it is scriptable. You can run it on millions of molecules, for free.

new 3D models for ZINC15 being released tomorrow (Wed Dec 9, 2015)

Dear ZINC15 Fans

Thank you to everyone who has written us asking about 3D models in ZINC15. As we said in the paper and on our wiki, we would start updating the 3D models in December 2015. Tomorrow is day 1. down for emergency maintenance

Dear ZINC users is down for emergency maintenance. We will bring it back up as soon as we can. Probably later Monday evening in San Francisco. We regret any inconvenience. In the meantime, please check out, which supports many of the features of zinc12, and many more. ZINC15 will replace ZINC12 completely in the summer of 2016.


ZINC update policy during the ZINC12->ZINC15 transition

Dear ZINC Fans

Our users ask several questions:

1) When will ZINC12 and ZINC15 be updated?
2) How long will the transition from ZINC12 to ZINC15 take?
3) Which one should I use? ZINC12 or ZINC15?

We take these up in turn.

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