UPDATE 2024-06-11 posted here. At the time of writing this (2024-04-11), the entire content of a “key” chemistry journal called Heterocycles , with over 17,000 articles in it, from 1973 to 2023, has been knocked offline due to what the publisher vaguely describes as “various circumstances”. The journal has been unavailable to access online since December 2023, which means the content has been offline for four or five months now!