2,5-Piperazinedione, 3,6-bis(5-chloro-2-piperidinyl)-, dihydrochloride, [3S-[3.alpha.(2S*,5R*),6.alpha.(2S*,5R*)]]- 2,5-Piperazinedione, 3,6-bis-(5-chloro-2-piperidyl)-, dihydrochloride 41109-80-2 593A Actinomycete fermentation product Compound 593A NSC135758 PIPERAZINEDIONE 593A PZD dihydrochloride, 3,6-bis(5-chloro-2-piperidinyl)-, dihydrochloride