KIO kio (1~{R},22~{R},23~{S},24~{R})-14-[[(2~{R},3~{S},4~{R},5~{R})-5-(6-aminopurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methyl]-7-azanyl-23,24-bis(oxidanyl)-25-oxa-2,4,6,9,14,17,20-heptazatetracyclo[20.2.1.0^{2,10}.0^{3,8}]pentacosa-3(8),4,6,9-tetraen-11-yne-16,19-dione KIO