8s 10s 8 glycoloyl 7 8 9 10 tetrahydro 6 8 11 trihydroxy 1 methoxy 10 2 3 6 trideoxy 3 2 2 2 trifluoroacetamido l lyxo hexopyranosyl oxy 5 12 naphthacenedione 8 valerate, 2 oxo 2 2s 4s 2 5 12 trihydroxy 7 methoxy 6 11 dioxo 4 2 3 6 trideoxy 3 trifluoroacetyl amino hexopyranosyl oxy 1 2 3 4 6 11 hexahydrotetracen 2 yl ethyl pentanoate, valrubicin