98474-21-6 Antibiotic A 32Y2 Benz(a)anthracene-1,7,12(2H)-trione, 9-(2,6-dideoxy-3-O-((2S-(2alpha,5beta,6beta))-5-((2,6-dideoxy-beta-L-arabino-hexopyranosyl)oxy)tetrahydro-6-methyl-2H-pyran-2-yl)-beta-D-arabino-hexopyranosyl)-3,4,4a,12b-tetrahydro-3,4a,8-trihydroxy-3-methyl Kerriamycin B NSC 372208 Urdamycin A