LL-D49194 ALPHA 1 LL-D49194 ALPHA 1 (LEDERLE ANTIBIOTIC) NSC381856 Trioxacarcin A, 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-dideoxy-3-C-methyl-.alpha.-L-xylo-hexopyranosyl)-3-C-methyl-.alpha.-L-xylo-hexopyranosyl]-13-O-methyl-