Update app.py

app.py

@@ -131,8 +131,8 @@ with c2:
   components.html(source_code, height = 400,width=400)
 
 st.write('Info about SMILES: https://archive.epa.gov/med/med_archive_03/web/html/smiles.html')
-st.write('https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system')
-st.write('https://pubchem.ncbi.nlm.nih.gov/#query=vitamin%20e')
+st.write('Learn about it at Wikipedia: https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system')
+st.write('Search for any compound on PubChem at National Library of Medicine: https://pubchem.ncbi.nlm.nih.gov/#query=vitamin%20e')
 
 
 MakeMolecule("Ethanol", "CCO")