Hello @ipazin
if i have the follwing URL
https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/**asp**/cids/TXT
https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/name/**glu**/cids/TXT
i need to change (Replace)
asp => aspirin
glu => glucose
i think your workflow works only if you want to replace the END of any URL but not the middle of it ?
best regards