(R)-9-(2,6-Dideoxy-3-O-((2S-(2alpha,5beta,6beta))-5-((2,6-dideoxy-beta-D-arabino-hexopyranosyl)oxy)tetrahydro-6-methyl-2H-pyran-2-yl)-beta-D-arabino-hexopyranosyl)-3,4-dihydro-3,8-dihydroxy-3-methylbenz(a)anthracene-1,7,12(2H)-trione 104542-46-3 Benz(a)anthracene-1,7,12(2H)-trione, 9-(2,6-dideoxy-3-O-((2S-(2alpha,5beta,6beta))-5-((2,6-dideoxy-beta-D-arabino-hexopyranosyl)oxy)tetrahydro-6-methyl-2H-pyran-2-yl)-beta-D-arabino-hexopyranosyl)-3,4-dihydro-3,8-dihydroxy-3-methyl-, (R)- Urdamycin B