Pyran
2-Butenoicacid,4,4'-[1a,2,5a,6,7,8a,9,10-octahydro-2,7,9,11-tetraoxo-5,13-dipentyl-10,6-(epoxymethano)oxireno[g]oxireno[6,7]naphtho[2,3-d][2]benzopyran-7a,11a(5H,11H)-diyl]bis[2-methyl-,[1aR-[1aa,5a,5aa,6b,7aa(E),8aa,10b,10aS*,11aa(E),13S*]]-
3-acetyl-3,5,12-trihydroxy-10-methoxy-6,11-dioxo-1,2,3,4,6,11-hexahydrotetracen-1-yl 2,3,6-trideoxy-4-O-(4-nitrobenzoyl)-3-[(trifluoroacetyl)amino]hexopyranoside
(1)Benzopyrano(3,4-B)furo(2,3-H)(1)benzopyran-6(6ah)-one, 1,2,12,12A-tetrahydro-6A-hydroxy-8,9-dimethoxy-2-(1-methylethenyl)-, (2R-(2alpha,6abeta,12abeta))-