6H-Benzo[d]naphtho[1,2-b]pyran-6-one, 4-(6-deoxy-3-C-methyl-.beta.-D-gulopyranosyl)-8-ethenyl-1-hydroxy-10,12-dimethoxy- 6H-Benzo[d]naphtho[1,2-b]pyran-6-one,4-(6-deoxy-3-C-methyl-.beta.-D-gulopyranosyl-8-ethenyl-1-hydroxy-10,12-dimethoxy- ALBACARCIN V NSC354844 VIRENOMYCIN V