100927-15-9 10183-93-4 17050-67-8 Chromomycin-B Chromomycinone D-threo-2-Pentulose, 5-deoxy-1-O-methyl-1-C-(1,2,3,4-tetrahydro-3,5,7,10-tetrahydroxy-6-methyl-4-oxo-2-anthracenyl)-, (2R-(2alpha(1S*),3beta))-