Japan Institute of Heterocyclic Chemistry, the publisher of the journal Heterocycles (1973-2023) [0] is suing CLOCKSS, after its content was released on June 25, 2024 [1]. All of the content from Heterocycles had ceased being available online, and per their agreement with CLOCKSS Archive in 2011,[2] all of the journal's 106 volumes have been made available under the CC BY-NC-ND 4.0 license.[3]<p>For how this works, see "How CLOCKSS Works" [4] & "How LOCKSS Works" [5].<p>Chemistry World also had an earlier article ("A key chemistry journal disappeared from the web. Others are at risk", 2024-04-09 [6]) discussing the journal's sudden disappearance [7] and the loss of access when it went offline, an increasingly common problem with scholarly research.<p>[0]: <a href="https://en.wikipedia.org/wiki/Heterocycles_(journal)" rel="nofollow">https://en.wikipedia.org/wiki/Heterocycles_(journal)</a><p>[1]: <a href="https://clockss.org/clockss-triggers-heterocycles/" rel="nofollow">https://clockss.org/clockss-triggers-heterocycles/</a><p>[2]: <a href="https://clockss.org/the-japan-institute-of-heterocyclic-chemistry-preserves-with-the-clockss-archive/" rel="nofollow">https://clockss.org/the-japan-institute-of-heterocyclic-chem...</a><p>[3]: <a href="https://clockss.org/triggered-content/heterocycles/" rel="nofollow">https://clockss.org/triggered-content/heterocycles/</a><p>[4]: <a href="https://clockss.org/about/how-clockss-works/" rel="nofollow">https://clockss.org/about/how-clockss-works/</a><p>[5]: <a href="https://www.lockss.org/use-lockss/how-lockss-works" rel="nofollow">https://www.lockss.org/use-lockss/how-lockss-works</a><p>[6]: <a href="https://www.chemistryworld.com/news/a-key-chemistry-journal-disappeared-from-the-web-others-are-at-risk/4019265.article" rel="nofollow">https://www.chemistryworld.com/news/a-key-chemistry-journal-...</a><p>[7]: <a href="https://web.archive.org/web/20240217181955/https:/www.heterocycles.jp/newlibrary" rel="nofollow">https://web.archive.org/web/20240217181955/https:/www.hetero...</a>