Synonyms: 11,16,18,19-Tetraoxapentacyclo[12.2.2.16,9.01,15.010,12]nonadeca-6,8-diene-7-carboxylicacid, 12-methyl-4-(1-methylethenyl)-17-oxo-, methyl ester,[1R-(1R*,4S*,10R*,12S*,14R*,15R*)]-; (-)-11b,12b-Epoxypukalide; 11b,12b-Epoxypukalide; Epoxypukalide