1	F9E	[(2~{S})-2-[(2-azanyl-6-oxidanylidene-3~{H}-purin-9-yl)methoxy]-3-oxidanyl-propyl] (2~{S})-2-azanyl-3-methyl-butanoate	1.000
2	TXC	2-[(2-amino-6-oxo-1,6-dihydro-9h-purin-9-yl)methoxy]ethyl L-valinate	0.920