RESIDUE V1L 16 CONECT O05 1 C04 CONECT C04 3 O05 C06 N03 CONECT C06 4 C04 C07 H1 H2 CONECT C07 4 C06 C08 H3 H4 CONECT C08 4 C07 C02 H5 H6 CONECT C02 4 C08 N03 H7 H8 CONECT N03 3 C04 C02 H9 CONECT H1 1 C06 CONECT H2 1 C06 CONECT H3 1 C07 CONECT H4 1 C07 CONECT H5 1 C08 CONECT H6 1 C08 CONECT H7 1 C02 CONECT H8 1 C02 CONECT H9 1 N03 END HET V1L 16 HETSYN V1L valerolactam HETNAM V1L piperidin-2-one FORMUL V1L C5 H9 N1 O1