The day today is Tuesday 11th June 2024. It marks at least 193 days now since the subscription access journal Heterocycles (e-ISSN: 1881-0942) was taken offline by its publisher. Published since 1973, it is a “key” journal in chemistry and contains over 17,000 articles which have been cited at least 164,000 times. The journal is preserved in the CLOCKSS archive.