1,8-diazacyclotetradecane-2,9-dione;1,8-Diaza-2,9-dioxocyclotetradecane; Hexahydro-2H-azepin-2-one Cyclic Dimer;6-Aminohexanoate Cyclic Dimer; Caprolactam Cyclic Dimer;; Caprolactam Dimer;Cyclic Dimer of ?-Caprolactam; 6-Aminohexanoic Acid Bimol. Cyclic Lactam;?-Aminocaproic Acid Cyclic Dimer; ?-Caprolactam Cyclic Dimer;1,8-Diaza-2,9-diketocyclotetradecane