1F5 1f5 (1R,3aS,4R,5R,6R,9aR,10E)-6-({(1S,2R,4S,5R,6R,8S,9S)-5-hydroxy-2-(methoxymethyl)-9-methyl-9-[(2S)-oxiran-2-yl]-3,7,10,1 1-tetraoxatricyclo[6.2.1.0~1,6~]undec-4-yl}oxy)-1-(methoxymethyl)-4,9a-dimethyl-7-(propan-2-yl)-1,2,3,3a,4,5,6,8,9,9a-de cahydrodicyclopenta[a,d][8]annulene-1,5-diol 1F5