CAS No 1033288-92-4 , 13H-9,12a-Epoxy-2H-cyclopropa[5',6']cycloocta[1',2':5,6]cyclohepta[1,2-c]furo[3,2-b]furan-2,8(5H)-dione,10-[(1S,2S)-2-(acetyloxy)-1-methyl-2-[(2S)-tetrahydro-4-methyl-5-oxo-2-furanyl]ethyl]dodecahydro-9,13-dihydroxy-5,5,10a-trimethyl-,(3aR,5aS,7aR,9S,9aS,10R,10aR,12aR,13S,13aS)-