(8S,10S)-8-acetyl-10-(((2R,4S,5S,6S)-4-azido-5-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-6,8,11-trihydroxy-5,12-dioxo-5,7,8,9,10,12-hexahydrotetracen-1-yl trifluoromethanesulfonate