Look for Absolute SMILES instead of Canonical

It appears that PubChem has updated their API and they no longer provide a "Canonical" SMILES. Instead, they provide an "Absolute" SMILES with the same info in the same place. Without this fix, the Canvas cannot create Molecule entities, as it raises an error saying that it can't find the SMILES string

Author: nickccollins

examples/chem-sync-local-flask/local_app/lib/pub_chem.py

@@ -45,7 +45,7 @@ def get_by_cid(cid: str) -> dict[str, Any]:
     synonyms_json = _pubchem_get(f"cid/{cid}/synonyms/JSON")
     compound_json = result_json["PC_Compounds"][0]
     name = synonyms_json["InformationList"]["Information"][0]["Synonym"][0]
-    smiles = _get_compound_string_prop(compound_json, label="SMILES", name="Canonical")
+    smiles = _get_compound_string_prop(compound_json, label="SMILES", name="Absolute")
     mono_isotopic_weight = _get_compound_string_prop(compound_json, label="Weight", name="MonoIsotopic")
     molecular_weight = _get_compound_string_prop(compound_json, label="Molecular Weight")
     return {