7-(4-amino-5-hydroxy-6-methyloxan-2-yl)oxy-9-[2-[3-[2-[4-(4-amino-5-hydroxy-6-methyloxan-2-yl)oxy-2,5,12-trihydroxy-7-methoxy-6,11-dioxo-3,4-dihydro-1H-tetracen-2-yl]-2-oxoethyl]sulfanylpropylsulfanyl]acetyl]-6,9,11-trihydroxy-4-methoxy-8,10-dihydro-7H-te