(6aS)-2,3,6aα,8,9,9aα-Hexahydro-8-(guanin-7-yl)-9-hydroxy-4-methoxycyclopenta[c]furo[3',2':4,5]furo[2,3-h][1]benzopyran-1,11-dione | (6aS)-2,3,6aα,8,9,9aα-Hexahydro-8-(guanin-7-yl)-9-hydroxy-4-methoxycyclopenta[c]furo[3',2':4,5]furo[2,3-h][1]benzopyran-1,11-dione | |