diff --git a/omnipath_metabo/schema/_structure.py b/omnipath_metabo/schema/_structure.py
new file mode 100644
index 0000000..c54b321
--- /dev/null
+++ b/omnipath_metabo/schema/_structure.py
@@ -0,0 +1,10 @@
+from sqlalchemy import create_engine, Column, Integer, String
+from sqlalchemy.ext.declarative import declarative_base
+
+Base = declarative_base()
+
+class Structure(Base):
+    __tablename__ = 'structures'
+    id = Column(Integer, primary_key=True)
+    mol_name = Column(String)
+    mol_structure = Column('mol_structure', String)