diff --git a/src/metadata/xsc_meta.py b/src/metadata/xsc_meta.py
index c12f403..7a601d0 100644
--- a/src/metadata/xsc_meta.py
+++ b/src/metadata/xsc_meta.py
@@ -64,7 +64,8 @@ def all_aliases() -> List[str]:
 
     @staticmethod
     def all_names_sorted_by_hitran_id() -> List[str]:
-        molecules = list(map(lambda m: MoleculeMeta(m), CrossSectionMeta.__XSC_NAMES))
+        molecules = list(filter(lambda m: m.populated, map(lambda m: MoleculeMeta(m), CrossSectionMeta.__XSC_NAMES)))
+        
         return list(map(lambda m: m.name, sorted(molecules, key=lambda m: m.id)))