Synonyms: SirodesminA, 2,4a-de(epidithio)-2,4a-epithio-, (5'R,7a)-;Spiro[3,9a-epithio-9aH-cyclopenta[4,5]pyrrolo[1,2-a]pyrazine-7(8H),2'(3'H)-furan]-1,3',4-trione,8-(acetyloxy)octahydro-8a-hydroxy-3-(hydroxymethyl)-2,4',4',5'-tetramethyl-,(2'S,3R,5'R,5aR,8S,8aS,9aR)- (9CI);Spiro[3,9a-epithio-9aH-cyclopenta[4,5]pyrrolo[1,2-a]pyrazine-7(8H),2'(3'H)-furan],sirodesmin A deriv.; Dethiosirodesmin PL; Sirodesmin H