1-Hydroxy-10,12-dimethoxy-8-vinyl-6H-benzo(d)naphthol(1,2b)pyran-6-one 6H-Benzo(d)naphtho(1,2-b)pyran-6-one, 8-ethenyl-1-hydroxy-10,12-dimethoxy- 80155-95-9 Defucogilvocarcin V Gilvocarcin V aglycone