Synonyms: Veratraman-6(5H)-one,17,23-epoxy-3,11-dihydroxy-, (3b,5a,11b,23b)-; (-)-Yibeissine;Spiro[9H-benzo[a]fluorene-9,2'(3'H)-furo[3,2-b]pyridin]-5(6H)-one,1,2,3,3'a,4,4',4a,5',6',6a,6b,7,7',7'a,8,11,11a,11b-octadecahydro-3,11-dihydroxy-3',6',10,11b-tetramethyl-,[3S-[3a,4ab,6aa,6bb,9a(3'S*,3'aR*,6'R*,7'aS*),11a,11ab,11ba]]-; Yibeissine