2,5-Piperazinedione, 3,6-bis(2-amidinothioethyl)-, dihydrochloride 2,5-Piperazinedione, 3,6-di(2-amidinothioethyl)-, dihydrochloride 3,6-Bis-(2-guanylthioethyl)-2,5-diketopiperazine dihydrochloride 6965-23-7 Carbamimidothioic acid, (3,6-dioxo-2,5-piperazinediyl)di-2,1-ethanediyl ester, dihydrochloride (9CI) NSC 67456 Piperazine, 3,6-bis(2-guanylthioethyl)-2,5-diketo-, dihydrochloride USAF A-4006