Showing structure for 6-[(1e,3e)-4-[(2r,3s)-3-[(2s,3r,3ar,4s,5s,6as)-5-ethyl-3,4-dihydroxy-3a,4-dimethyl-tetrahydrofuro[2,3-b]furan-2-yl]oxiran-2-yl]buta-1,3-dien-1-yl]-4-methoxy-5-methylpyran-2-one