Synonyms: Card-20(22)-enolide,14-hydroxy-2,3-[(6-hydroxy-9-methyl-8-oxa-1-thia-4-azaspiro[4.5]decane-6,7-diyl)bis(oxy)]-19-oxo-,[2a(5S,6R,7S,9R),3b,5a]-; Voruscharin (8CI); Voruscharine (6CI);Spiro[1H,11H-cyclopenta[7,8]phenanthro[2,3-b]pyrano[3,2-e][1,4]dioxin-11,2'-thiazolidine],card-20(22)-enolide deriv.