10-[[2-O-(2-Amino-3-O-methyl-2,6-dideoxy-α-D-galactopyranosyl)-3-C-methyl-6-deoxy-β-D-galactopyranosyl]oxy]-6-hydroxy-1-methylbenzo[h][1]benzopyrano[5,4,3-cde][1]benzopyran-5,12-dione