98474-21-6 Antibiotic A 32Y2 Benz[a]anthracene-1,7,12(2H)-trione, 9-[2,6-dideoxy-3-O-[[2S-(2.alpha.,5.beta.,6.beta.)]-5-[(2,6 -dideoxy-.beta.-D-arabino-hexopyranosyl)oxy]tetrahydro-6-me thyl-2H-pyran-2-yl]-.beta.-D-arabino-hexopyranosyl]-3,4,4a, 12b-tetrahydro-3,4a,8-trihydroxy-3-methyl-12b-[(tetrahydro- 5-hydroxy-6-methyl-2H-pyran-2-yl)oxy]-, [3R-[3.alpha.,4a.alpha.,12b.alpha.(2S*,5S*,6S*)]]- Kerriamycin B NSC606397 Urdamycin A