diff --git a/code/kg2/multi_ont_to_json_kg.py b/code/kg2/multi_ont_to_json_kg.py
index 69871c48c..84ed55d80 100755
--- a/code/kg2/multi_ont_to_json_kg.py
+++ b/code/kg2/multi_ont_to_json_kg.py
@@ -38,6 +38,7 @@
 REGEX_YEAR_MONTH = re.compile('[12][90][0-9]{2}_([0-9]{1,2})')
 REGEX_PUBLICATIONS = re.compile(r'((?:(?:PMID)|(?:ISBN)):\d+)')
 REGEX_XREF_END_DESCRIP = re.compile(r'.*\[([^\]]+)\]$')
+REGEX_OBSOLETE = re.compile("^obsolete|\(obsolete||obsolete$", re.IGNORECASE)
 
 IRI_OBO_XREF = kg2_util.IRI_OBO_FORMAT_XREF
 CURIE_OBO_XREF = kg2_util.CURIE_ID_OBO_FORMAT_XREF
@@ -813,6 +814,8 @@ def biolink_depth_getter(category: str):
                 if node_name.lower().startswith('obsolete:') or \
                    (node_curie_id.startswith(kg2_util.CURIE_PREFIX_GO + ':') and node_name.lower().startswith('obsolete ')):
                     node_deprecated = True
+                if REGEX_OBSOLETE.match(node_name) is not None:
+                    node_deprecated = True
 
             if node_description is not None:
                 if node_description.lower().startswith('obsolete:') or node_description.lower().startswith('obsolete.'):