A1MBE a1mbe (1~{R},6~{S},8~{R},9~{R},10~{S},15~{R},17~{R},18~{R})-8,17-bis(6-aminopurin-9-yl)-3,12-bis(oxidanyl)-3,12-bis(oxidanylidene)-2,7,11,13,16-pentaoxa-4-thia-3$l^{5},12$l^{5}-diphosphatricyclo[13.2.1.0^{6,10}]octadecane-9,18-diol A1MBE