Synonyms: Retrorsine(6CI,7CI,8CI); Senecionan-11,16-dione, 12,18-dihydroxy-; NSC 107659; Retrorsin;[1,6]Dioxacyclododecino[2,3,4-gh]pyrrolizine-2,7-dione,3-ethylidene-3,4,5,6,9,11,13,14,14a,14b-decahydro-6-hydroxy-6-(hydroxymethyl)-5-methyl-,[5R-(3Z,5R*,6S*,14aR*,14bR*)]-; b-Longilobine