4 x
ZNB:
2-[6-azanyl-9-[(2R,3R,4S,5R)-5-[[(azanylidene-$l^{4}-azanylidene)amino]methyl]-3,4-bis(oxidanyl)oxolan-2-yl]purin-8-yl]sulfanyl-N-[[(2R,3S,4R,5R)-5-(6-azanyl-8-bromanyl-purin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methyl]ethanamide(Non-covalent)