2,5-Piperazinedione, 3,6-bis(5-chloro-2-piperidinyl)-, dihydrochloride, (3S-(3alpha(2S*,5R*),6alpha(2S*,5R*)))- (9CI) 2,5-Piperazinedione, 3,6-bis(5-chloro-2-piperidyl)-, dihydrochloride 3,6-Bis(5-chloro-2-piperidyl)-2,5-piperazinedione dihydrochloride 41109-80-2 593-A Actinomycete fermentation product Compound 593A NSC-135758 Piperazinedione Piperazinedione 593A