(1R,3aS,8R,8aS,9S,11R,12R,12aS,13R,13aS)-5-acetyl-13a-hydroxy-1,8a,12,12a-tetramethyl-2-oxo-1,2,3a,6,7,8,8a,9,10,11,12,12a,13,13a-tetradecahydrobenzo[4,5]cyclodeca[1,2-b]furan-8,9,11,13-tetrayl reltet 2,12,14,16-Tetraacetoxy-3-hydroxy-1,4,13,17-tetramethyl-5-oxo-6-oxa-tricyclo[11.4.0^(3,7)]heptadec-8-ene-9-carboxylic acid methyl ester Erythrolide O InChI=1/C30H42O12/c1-14-22(38-17(4)32)13-24(40-19(6)34)29(9)23(39-18(5)33)11-10-21(16(3)31)12-25-30(37,15(2)26(36)42-25)27(28(14,29)8)41-20(7)35/h12,14-15,22-25,27,37H,10-11,13H2,1-9H3/b21-12+/t14-,15-,22+,23+,24-,25-,27+,28+,29-,30-/m0/s benzo[4,5]cyclodeca[1,2-b]furan-2(1H)-one, 5-acetyl-8,9,11,13-tetrakis(acetyloxy)-3a,6,7,8,8a,9,10,11,12,12a,13,13a-dodecahydro-13a-hydroxy-1,8a,12,12a-tetramethyl-, (1R,3aS,4E,8R,8aS,9S,11R,12R,12aS,