[NTG-context] Chemistry in LMTX

I tried to update https://wiki.contextgarden.net/Chemistry, since nearly all of the links were dead, and I couldn’t find any documentation about \chemical / \startchemical. In the wiki page you can see that there’s still some working code for chemistry, but it looks very broken. ppchtex.mkiv is apparently still code from 1996 (and can’t work, since neither PicTeX nor PStricks are supported in LMTX any more). chem-str.lua seems to be an updated version by Alan & Hans Did I miss something? Hraban