Synonyms: Card-20(22)-enolide,14-hydroxy-19-oxo-2,3-[(tetrahydro-3-hydroxy-6-methyl-4-oxo-2H-pyran-3,2-diyl)bis(oxy)]-,[2a(2S,3R,6R),3b,5a]-; Uscharidin (6CI,8CI);9H,13aH-Cyclopenta[7,8]phenanthro[2,3-b]pyrano[3,2-e][1,4]dioxin,card-20(22)-enolide deriv.