Synonyms: 3a,7-Epoxy-3aH-furo[3,2-b]oxocin-3-carboxylicacid,5-[6-(2,5-dihydro-4-hydroxy-1-methyl-2-oxo-1H-pyrrol-3-yl)-1,3-dimethyl-6-oxo-2,4-hexadienyl]octahydro-2,6,9a-trimethyl-8-oxo-,methyl ester, [2R-[2a,3a,3aa,5a(1R*,2E,4E),6b,7a,9ab]]-; Antibiotic BU 2313A