99743-21-2 LL D49194beta 2 LL-D49194beta2 Trioxacarcin A, 4'-O-deacetyl-13-O-de(4-C-acetyl-2,6-dideoxy-alpha-L-xylo-hexopyranosyl)-16-O-demethyl-16-O-(2,6-dideoxy-4-O-(2,6-didexoy-3-C-methyl-alpha-L-xylo-hexopyranosyl)-3-C-methyl-alpha-L-xylo-hexopyranosyl)-13-O-methyl-