3209-31-2 Antibiotic C3368-A Bis-dechlorogeodin Bisdechlorogeodin C3368-A Spiro(benzofuran-2(3H),1'-(2,5)cyclohexadiene)-2'-carboxylic acid, 4-hydroxy-6'-methoxy-6-methyl-3,4'-dioxo-, methyl ester